Dear Developers and All,
lpdf.checkedkey routine from lpdf-ini.lua has problems with accessing
false boolean values, it returns them as nil. Is it by design or
neglect?
(I vaguely remember stumbling on this problems before, so there is a
chance that I have already got the answer, but have
Dear Peter,
More a lua design decision. 'nil' is equal to 'false' here
I know no CS theory behind lua design, but try this:
\starttext
\startluacode
if nil == false then
io.write(nil == false\n)
end
if nil ~= false then
io.write(nil ~= false\n)
end
\stopluacode
TEST
\stoptext
and get
nil
Dear Aditya, Peter and All,
I think that what Peter meant was:
the real issue is not teaching me lua and improving the style of my example,
but my complaint (correct or not) about inability of lpdf.checkedkey
to correctly fetch false boolean values: they are fetched as nil, just
as if they were
Dear Hans,
well, they're just not treated special
IMHO, they have to be treated special.
you can try this (untested)
I have tested it. It adds nice enhancement, but does not fix the bug
In the following case
local a = {}
a[e] = blabla
a[t] = true
a[f] = false
a[x] = true
a[y] = false
a[z] =
Dear Hans,
more like
function lpdf.checkedkey(t,key,variant)
thank you. That works. Please, commit.
Michail
PS.
lpdf.checkedkey issue was raised while I reviewed 3D PDF support.
But there are greater problems:
It seems that u3d inclusion stopped to work in the current (2014.09.06
20:59)
Dear luigi,
you wrote:
I've to play a bit with width , height and the 3D controls of the
adobe reader to have a nice view,
You could just use movie15 parameters (from Laurana.tex in the archive
you mention)
3Daac=60, 3Droll=0, 3Dc2c=0 745.639 0, 3Droo=745.639, 3Dcoo=22.607
-1618.68 -149.864,
Dear Developers and All,
when I create a PDF dictionary with a small number
local mydict = lpdf.dictionary { TT = 0.01 }
lpdf.flushobject(mydict)
I get in PDF
/TT 1e-18
that confuses the Adobe Reader (if dictionary is used).
As far as I can investigate,
Dear Hans and All,
On Sat, Aug 18, 2012 at 10:00 PM, Michail Vidiassov mas...@iaas.msu.ru wrote:
the examples from back-u3d.mkiv fail to work with latest beta
(rectangled undefined message appears instead of annotation),
but if \textwidth is replaced by in in the tex file 3D annotations
Dear Wolfgang and All,
On Sun, Sep 9, 2012 at 4:52 PM, Wolfgang Schuster
wolfgang.schus...@gmail.com wrote:
in the latest minimals (2012.09.06 23:03) the following example from
back-u3d.mkiv fails to work
\useexternalfigure [test] [test.prc] [width=0.5\textwidth, ...
It should work
Just a follow up -
the old way width=0.5\textwidth still works for png external figures.
Is it considered non-kosher now and is to be changed everywhere to the
new one “width=\the\dimexpr0.5\textwidth\relax” whenever possible to
avoid potential problems?
Dear Hans and All,
the examples from back-u3d.mkiv fail to work with latest beta
(rectangled undefined message appears instead of annotation),
but if \textwidth is replaced by in in the tex file 3D annotations
appear OK.
Is that a bug, a feature or some transitional state of ConTeXt
(case when
Dear Hans and All,
if I use example from scrn-wid.mkvi
\attachment[file=oeps.tex,title=Oeps,author=Hans,subtitle=TeX
File,method=hidden]
empty file gets embedded and all specs are lost.
If I remove method=hidden all is OK - file is there, I can see
supplied information in Adobe Reader list of
Dear Hans,
when you fixed the bug with attachment being listed twice
in the attachment list, you also enhanced attachment support
On Mon, 28 Feb 2011, Hans Hagen wrote:
as far as i can see there were a couple of issues:
attachments without associated annotation, and labeling and both are
Dear Hans,
On Mon, 21 Feb 2011, Hans Hagen wrote:
to be precise, the attachment is attached once
but is listed twice by Adobe Reader.
i'll patch lpdf-wid
on one hand your patch fixes the bug that is in the Subj. of the
thread, but it does just that and nothing more. It is a pity
to see
Dear Hans,
On Mon, 28 Feb 2011, Hans Hagen wrote:
to be precise, the attachment is attached once
but is listed twice by Adobe Reader.
i'll patch lpdf-wid
on one hand your patch fixes the bug that is in the Subj. of the thread,
this is a bit of a weird comment given that i haven't uploaded
Dear Hans,
On Mon, 21 Feb 2011, Hans Hagen wrote:
i'll patch lpdf-wid but somehow I get the impression that it's more a viewer
issue (the list shown seems to be a merge of filename as well as symbolic
names while a clever list builder should look at the referred objects) ...
but maybe no one
Dear Hans,
On Wed, 23 Feb 2011, Hans Hagen wrote:
Attachments have some history in pdf and each version was slightly different.
as far as I understand ConTeXt now can not link file attachment to
arbitrary picture, just to some predefined icons. Am I right?
Is it going to change? Soon?
Dear Hans,
I'd like to remind you about an old problem report
--
From: Tobias Burnus
Date: 2008-01-04 16:01 +300
I can use \useattachment to embed/attach files in a PDF file. I can use:
\useattachment[whatever][title][newname][test.tex]
\attachment[whatever]
This creates an attachment
Dear All,
to be precise, the attachment is attached once
(can be seen if one inspects the sample PDF files in uncompressed form with
any text or binary editor - if you do not have Adobe Acrobat), but is
listed twice by Adobe Reader.
Sincerely, Michail
Dear Developers,
On Sun, 20 Feb 2011, Michail Vidiassov wrote:
to be precise, the attachment is attached once
but is listed twice by Adobe Reader.
PDF spec states
--
An embedded file stream shall be included in a PDF document in one of the
following ways:
• Any file specification
Dear Hans,
On Mon, 21 Feb 2011, Hans Hagen wrote:
to be precise, the attachment is attached once
but is listed twice by Adobe Reader.
code in lpdf-wid.lua sends everything to EmbeddedFiles - including
files associated with a location on a page in the document
i'll patch lpdf-wid
it'd be
Dear All,
This current context is meant for texlive 2010, but there is a little
time before the final freeze of the texlive repository, so there will
be a bugfix update in a week or so.
If you have pending urgent bugs (especially in mkii) this would be an
excellent time to report them.
is it
Dear Hans,
On Thu, 13 May 2010, Hans Hagen wrote:
On 13-5-2010 12:16, Michail Vidiassov wrote:
is it worth trying to fix 3D annotations now?
I have a patch I have posted here (3D annotations thread),
but it is both a fix for errors (like == used instead of = )
and a work-around for missing
Dear Hans,
On Thu, 13 May 2010, Hans Hagen wrote:
well, i'm that someone but indeed i didn't test it (as i have no test files
on my system anyway) .. are those tests you sent free? i.e. can i add them to
the testbed?
patch and test case attached
patched roughly that way ... new beta on
Dear All,
You could try the mailing list, but a better approach to bug reporting
is to simultaneously create a tracker item at this url:
http://tracker.luatex.org/search.php?project_id=2
done that http://tracker.luatex.org/view.php?id=393
it seems pdfboolean function akways returns true if
Dear gummybears,
On Tue, 4 May 2010, gummybears wrote:
I read your email (17 april 2010) on the mailing list and applied the two
patches to my Context minimal distro
(the very latest version). When I run your test.tex through context the
preview image test.png is not
Dear Hans,
I wrote to you
thank you for your latest effort to put u3d support in a working state, but
more thanks for more effort, but
May be a more robust way is to read first 3 bytes of the model file, since
U3D or PRC signature is always there - that can be done instead of
relying on
On Thu, 1 Apr 2010, Martin Schröder wrote:
Good news - if it isn't an April hoax. :-)
and a good one, one you _want_ to believe...___
If your question is of interest to others as well, please add an entry to the
Dear gummybears (and hopefully Hans),
On Sat, 23 Jan 2010, gummybears wrote:
After a couple of tests here are my findings
*) The preview does not work at this moment. I only see a light blue square
which can be activated.
After which the 3d viewer shows the embedded 3d image
The developers
Dear Hans,
On Wed, 24 Mar 2010, Hans Hagen wrote:
when given examples of something that does not work i can repair it
in lpdf-ini.lua one can find the following utility function for setting a
boolean config parameter:
local function pdfboolean(b,default)
if ((type(b) == boolean) and
Dear Hans,
On Wed, 24 Mar 2010, Hans Hagen wrote:
there is u3d support presen tbut nobody tested it
thank you for your latest effort to put u3d support in a working state,
but as of now even the most basic test from back-u3d.mkiv does not work
and is not supposed to:
grph-u3d.lua needs
Dear Hans,
On Thu, 25 Mar 2010, Michail Vidiassov wrote:
On Wed, 24 Mar 2010, Hans Hagen wrote:
there is u3d support presen tbut nobody tested it
thank you for your latest effort to put u3d support in a working state, but
now that Adobe has fallen in love with a new 3D format, PRC
Dear All,
I notice that broken code for inserting movies uses
node.write in codeinjections.insertmovie (in back-pdf.lua),
while figures.checkers.mov (in grph-inc.lua) expects text return
from codeinjections.insertmovie to feed to texsprint(ctxcatcodes.
The 3D annotation code (it also seems not
Dear Luigi and All,
On Wed, 24 Mar 2010, luigi scarso wrote:
I'm pretty sure that I still don't understand much , but
I have written an article for including swf in mkiv , cfr
am I correct to assume that swf inclusion works ok and is done in a
current kosher way in latest minimals
and so
Dear Luigi and All,
On Wed, 24 Mar 2010, luigi scarso wrote:
Hans provided me the skeleton -- like yours u3d files --- and I must
rewrite a 2nd article to implement the mkiv way.
And where the mkiv way is to be studued?
What kinds of inclusion not only work, but are implemented
in the modern
Dear All,
what is the current policy of NTG regarding Subj.?
The links to 2008 issues of MAPS (36 and 37) result in
The PDF version of this document will be
available one year after the paper version.
In 2010 that message is somewhat confusing.
Sincerely, Michail
Dear Hans,
when given examples of something that does not work i can repair it
take a look at http://www.ntg.nl/pipermail/ntg-context/2010/047898.html
- it is about problem with movies, but movies and u3d are both done via
annotations, thus there are similarities.
it is already coded .. see
Dear All,
I am running Mac OS X 10.6.2, latest minimals
luatex is beta-0.52.0-2010031913, Mach-O 64-bit executable x86_64
the fillowing file test.tex fails to compile with context test.tex
\nopdfcompression
\startluacode
local attr = lpdf.dictionary {}
On Mon, 22 Mar 2010, Taco Hoekwater wrote:
Anway, it runs ok here with rev. 3535 on linux 32. Don't have
access to a 64-bit machine right now.
latest minimals
Debian 5.0.4, Linux debian 2.6.2-2-amd64
luatex beta-0.52.0-2010031622 ELF 64-bit LSB executable, x86-64, dynamically
linked for
Dear All,
it seems including movies does not work:
\starttext
\placefigure[here]{none}{\externalfigure[demo.mov][width=0.7\textwidth,
height=.7\textwidth, label=demo]}
\stoptext
processed with context test_mov.tex results in
! LuaTeX error
Dear gummybears,
On Sat, 23 Jan 2010, gummybears wrote:
For anyone interested, the 3d file was produced with Asymptote 1.91
(http://asymptote.sourceforge.net/)
May you provide asy, png, prc and pdf (both ConTeXt and Asymptote-LaTeX
versions)?
Sincerely, Michail
PS. That was me who
Dear All,
I run Mac OS X 10.6 (Intel)
running first-setup.sh (in empty dir, if that matters)
results in
/Users/master/context.new/bin/mtxrun:5416: attempt to index global 'tex' (a nil
value)
Any ideas?
Sincerely, Michail
Dear Taco,
On Thu, 15 Oct 2009, Taco Hoekwater wrote:
I have been playing around a bit with the new ConTeXt Minimals and
especially Cambria Math. I couldn't figure out, however, why the
integral operator always comes out at about half the size of \sum or
\prod.
No, that is clearly not right.
Dear All,
I have fixed this by using:
label.rt(textext(\framed[frame=off,align=right]{One\\Two}),origin);
And what about proper tables there?
Replacing One\\Two in the above code with
$ \startmathmatrix \NC 1 \NC 1 \NR \NC 1 \NC 1 \NR \stopmathmatrix $
or
\starttable{|cm|cm|} \NC 1 \NC 1
Dear All,
On Mon, 17 Aug 2009, Taco Hoekwater wrote:
While the space after the inlined subscripts does look excessive, it
faithfully matches the font's MATH table: the integrals in cambria math
have a massive italic correction even though they fit in their bounding
boxes quite nicely.
Maybe
Dear Aditya and All,
On Sun, 16 Aug 2009, Aditya Mahajan wrote:
is there a replacement of hdotsfor from LaTeX to fill
several cells in a matrix row with one long series of dots?
Not that I know of. Currently, you can manually do this using TeX primitives.
\startformula
\startmathmatrix
Dear Taco,
On Sun, 16 Aug 2009, Taco Hoekwater wrote:
I get too much space between the integral sign and limits of integration.
Is it a bug? Are there fixes/workarounds?
Do you recall whether this was ok earlier?
I did not use integral with limits before, I am new in ConTeXt land.
Dear All,
is there a replacement of hdotsfor from LaTeX to fill
several cells in a matrix row with one long series of dots?
Sincerely, Michail
___
If your question is of interest to others as well, please add
Dear All,
using Cambria + Cambria Math (\usetypescript[cambria] \setupbodyfont[cambria])
makes Unicode math input and typesetting instantly possible
(great for a newbie, even if not FSF-kosher) -
but for missing glyphs for leqslant\geqslant.
What is the right way to fix or work around such
Dear All,
On Wed, 12 Aug 2009, Aditya Mahajan wrote:
using Cambria + Cambria Math
makes Unicode math input and typesetting instantly possible
but for missing glyphs for leqslant\geqslant.
There is not much that we can do when the glyph is missing from the font. In
principle, we can create a
Dear Hans and All,
On Tue, 21 Jul 2009, Hans Hagen wrote:
Superscript works well, but not the subscript:
\starttext
x³ x₃
\stoptext
Unicode sub/superscripts aren't real sub/superscripts, and there use is
discouraged. Most fonts will align those subscript glyphs to the base
line not bellow
Dear Hans,
On Fri, 5 Jun 2009, Hans Hagen wrote:
a draft for an analog of LaTeX movie15 package for including Adobe Reader
compatible 3d models into PDF files is at
i'll have a look at it next week; the interface needs some more thinking from
my side; in principle we should not use
Dear Hans, Mojca and All,
a draft for an analog of LaTeX movie15 package for including Adobe Reader
compatible 3d models into PDF files is at
http://www.iaas.msu.ru/tmp/movie15context.tgz .
Almost no docs/comments inside, but questions are of course welcome.
You'd better take a brief look at
Dear Luigi,
On Fri, 5 Jun 2009, luigi scarso wrote:
a draft for an analog of LaTeX movie15 package for including Adobe Reader
compatible 3d models into PDF files is at
hi michael
some time ago Renaud Aubin discover
http://meshlab.sourceforge.net/
2008-11-22 19:132008-11-22 18:13
Dear Renaud,
On Fri, 5 Jun 2009, Renaud Aubin wrote:
Asymptote may be a better choice since it supports newer PRC 3D
format, that is much richer in features and has better prospects when
it comes to support and development by Adobe.
Ouch, another new 3D format! This will never end. I bet no
Dear Luigi,
On Fri, 5 Jun 2009, luigi scarso wrote:
Asymptote may be a better choice since it supports newer PRC 3D
format
Ouch, another new 3D format! This will never end. I bet no valuable Open Source
modeler (i.e. blender) support this one. The fact that asy
supports PRC is
Dear Hans,
I wrote
I have developed code to create 3D annotations some months ago
(to do what movie15 does in LaTeX), but now (latest beta) it does not work.
Since movie inclusion I have used as a base is also broken
(
\placefigure[here]{none}{\externalfigure[demo.mov][width=0.7\textwidth,
Dear Hans,
On Wed, 3 Jun 2009, Hans Hagen wrote:
Since movie inclusion I have used as a base is also broken
fixed
Beta in minimals this morning ...
did not include the movie.
well, i get the movie here; did you specify the width and height?
Sorry, tested with Apple viewer, Adobe Reader
Dear Mojca and All,
the unique feature of Asymptote is 3D PDF.
I have developed code to create 3D annotations some months ago
(to do what movie15 does in LaTeX), but now (latest beta) it does not work.
Since movie inclusion I have used as a base is also broken
(
Dear Mojca,
On Tue, 2 Jun 2009, Mojca Miklavec wrote:
It will help a lot if you could post a link to some file to be
included, so that Hans has something to play with in hand.
http://www.navone.org/Media/Movies/AlienSong_mp4.mov
Sincerely, Michail
Dear All,
is it possible to produce dvi in mkiv?
What is the command line?
Are there limitations (like no opentype, no unicode math)?
DVI has to be fit for dvips use.
The reason for my question - Asymptote vector drawing tool
sets labels by processing PS output of LaTeX and relies on the PS
Dear Hans,
On Sun, 19 Apr 2009, Hans Hagen wrote:
is it possible to produce dvi in mkiv?
DVI has to be fit for dvips use.
The reason for my question - Asymptote vector drawing tool
sets labels by processing PS output of LaTeX and relies on the PS
being made by dvips.
you can produce dvi
Dear Hans,
On Sun, 19 Apr 2009, Hans Hagen wrote:
If mkiv does not produce dvi (now? never will? not intended to?),
what about mkii?
sure, mkii can produce dvi for several drivers
And what about the first part of the question?
The (negative?) answer is implied in your other post,
but what
Dear Mojca,
On Sun, 19 Apr 2009, Mojca Miklavec wrote:
If Asymptote is not able to handle PDF files, maybe Asymptote itself
would need extensions. (When I last tried to use Asymptote I gave up
since I was not able to figure out how to install it and started using
other tools.)
This
Dear All,
is it possible to and howdoi produce EPDF (in mkiv if it matters).
By EPDF I mean EPS like PDF, pagesize == bounding box of what is really
printed with minimal or no white border.
Reason to do that - produce with ConTeXt one-two line short labels for
another program (Asymptote).
Dear Mojca and All,
On Sun, 19 Apr 2009, Mojca Miklavec wrote:
(When I last tried to use Asymptote I gave up
since I was not able to figure out how to install it and started using
other tools.)
It would be really nice if someone would be ready to spend time to
include asymptote in TeX Live.
Dear All,
Is there any way in ConTeXt to set PDF ExtensionLevel, as per
http://www.adobe.com/devnet/acrobat/pdfs/adobe_supplement_iso32000.pdf
and like
%PDF 1.7
/Type /Catalog
/Extensions
/ADBE
/BaseVersion /1.7
/ExtensionLevel 3
Sincerely,
Dear Taco and All,
Taco Hoekwater wrote:
type-mac for Mac OS (are .dfont fonts working in LuaTeX 0.40).
That would be nice, but I am not sure I will get around to implementing
it (besides time constraints, it is never easy to develop for a platform
one doesn't actually have).
BTW, how the
Dear Vyatcheslav,
On Tue, 10 Mar 2009, Vyatcheslav Yatskovsky wrote:
I have Samsung ML-1615 laser printer. When I print an MS Word document
typesetted in Times New Roman, the printer uses internal (hardware) font
resource, and hardcopy is very smooth and nice. When I print a pdf generated
by
Dear All,
I have a comment only on a minor issue and just warning, not error:
On Fri, 27 Feb 2009, Vyatcheslav Yatskovsky wrote:
Does somebody know what the following means? (Was working a few monthes ago)
load otf | warning: The glyph named mu is mapped to U+00B5.
But its name indicates it
Dear All,
sorry for a stupid question, the unicode math that is about to come
means formula input using Unicode Math instead of tex commands as
suggested in
Unicode Nearly Plain-Text Encoding of Mathematics
http://www.unicode.org/notes/tn28/UTN28-PlainTextMath-v2.pdf
or use of the Unicode
Dear Mojca and All,
sorry for a stupid question, the unicode math that is about to come
means formula input using Unicode Math instead of tex commands as
suggested in Unicode Nearly Plain-Text Encoding of Mathematics
The answer to your question might as well be a tiny bit of yes because
I'm
Dear All,
I am slowly implementing Subj. for mkiv + luatex combo and it already kinda
works..
Is there anyone on the list now interested in testing/using it?
Sincerely, Michail
___
If your question is of
Dear All,
I agree, it should be documented better. I figured the usage from the
source and trial and error.
i wrote it when it was just available bug bugged in the viewer so it never
made it into some myway since i never used it except from demos
is the functionality supposed to work in
Dear Andrey and All,
On Thu, 25 Dec 2008, Andrey Riabushenko wrote:
Works on ConTeXt Minimals, but does not work on TeX Live 2008 and teTeX 3.0.
In there a solution that will work on every of three distributions?
teTeX is abandoned by te and is considered obsolete, is not it?
Is really
Dear All,
I need to fill a lua table with data, and some values may be tables.
How to supply that data from ConTeXt?
The most straightforward way is to make user fill a string with lua code
of table initiaiser and then use loadstring.
In this case the syntax is laconic, but resilence in case of
Dear Hans,
On Mon, 1 Dec 2008, Hans Hagen wrote:
i uploaded an alpha zip which has mov inclusion working
Where to?
website
Sorry for stupid question :(
That inclusion does really work but for a minor problem -
label parameter is ignored and the label (or name as it is displayed
by the
Dear All,
among advertised advantages of TeX there used to be optical scaling,
when text in the same font but in different sizes has different shapes of
glyphs. That used to be the feature of metafont fonts and derived
PostScript ones (like cm-super).
But it seems now, with TeX Gyre becoming the
Dear All,
On Wed, 3 Dec 2008, Idris Samawi Hamid wrote:
That used to be the feature of metafont fonts and derived
PostScript ones (like cm-super).
Or Latin Modern, also derived from the meta sources.
But it seems now, with TeX Gyre becoming the default free fonts set, it
seems the idea is
Dear Hans,
On Sun, 30 Nov 2008, Hans Hagen wrote:
i uploaded an alpha zip which has mov inclusion working
Where to?
Is there any way in luatex/context to include a pdf file with annotations
(without losing them). Not necessary embedding it into a page, but also as
currently not, at some
Dear Luigi and All,
On Wed, 26 Nov 2008, luigi scarso wrote:
Renaud Aubin wrote:
See http://www.nibua-r.org/ConTeXt/devel/
while the macros there are a great improvement from
what was posted on the list and look extandable for my purposes
the other question remains - does it
Dear Hans and All,
you wrote:
ConTeXt user manual says movies are just like figures,
but when I process
works ok in pdftex
\placefigure
[here]
{none}
{\externalfigure[texwork.mov][width=0.7\textwidth,
height=.7\textwidth,label=demo,preview=yes]}
in luatex i simply didn't implement it
Dear Hans and All,
On Fri, 28 Nov 2008, Hans Hagen wrote:
But where to look for luatex-related code to use as an example and
starting point for u3d handling?
not there; maybe next year
And also concerning mov including he wrote
in luatex i simply didn't implement it yet (will do it soon)
Dear All,
ConTeXt user manual says movies are just like figures,
but when I process
\starttext
\placefigure[here]{none}{\externalfigure[demo.mov][width=0.7\textwidth,
height=.7\textwidth, label=demo, preview=yes]}
\stoptext
with
context filename.tex
using the latest minimals without any
Dear All,
Renaud Aubin wrote:
See http://www.nibua-r.org/ConTeXt/devel/
while the macros there are a great improvement from
what was posted on the list and look extandable for my purposes
(thanks, Renaud),
the other question remains - does it make sense to try to implement
3d model embedding in
Dear All,
since ConTeXt lacks support for embedding 3D models (U3D or PRC) into PDF
(btw, is pdf annotations support in context/luatex combination fit for end-user
or is in transition?)
I have tried to embed some 3D PDFs from
http://asymptote.sourceforge.net/gallery/3D%20graphs/
and
Dear All,
On Fri, 10 Oct 2008, Zhichu Chen wrote:
If I want to embed the .prc file into a pdf document, all I need to do
is specify the correct /Subtype and mime type. That's very easy. I
think creating 3D presentations without any commercial or mouse-
clicking-GUI interface becomes
Dear All,
And how to embed .prc files into the .pdf document?
I have made a standalone embedder some time ago,
reproducing capabilities of movie15 LeTeX package and somewhat extending them.
If anybody is interested it can be put in shipable state.
Sincerely, Michail
Dear Hans and All,
in char-def.lua there are no adobename for
greekDelta AKA GREEK CAPITAL LETTER DELTA
greekOmega AKA GREEK CAPITAL LETTER OMEGA
greekmuAKA GREEK SMALL LETTER MU
because adobenames Delta, Omega and mu are used for
INCREMENT, OHM SIGN, textmu AKA MICRO SIGN.
While the
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