<--- On Jan 13, Hans Hagen wrote --->
Aditya Mahajan wrote:
No, I mean the complicated math is much harder in context. Consider
\begin{align}
a &= b \\
c &= d \notag \\
&= f \notag \\
&= g
\end{align}
which will typeset as
a = b (1)
c = d
= f
= g (2)
\begin{subequations}
\begin{align}
a &= b \\
c &= d
\end{align}
\end{subequations}
Compare this from how to do this in context (see the wiki). You have to
*manually* set the number of the subequation. Actually, for equation
numbering and refering, the context way is rather limited. Consider
something like an align environment
a &= b\\
c &= d\\
e &= f
Suppose, I want to refer to the second equation. In latex, I can simply
add \label{eq:2} and the end of c&= d and then \ref{eq:2}. For context, the
reference label goes at the top, with \placeformula[eqs]. But I am not
sure, how to give individual labels to each equations.
this 'loose label' is one of the ugliest concept i can think of -)
If you come up with any other way, I will be glad to use it. Frankly,
I do not think that the latex syntax is the best, but plain tex looks
too indimidating and context does not have anything yet.
btw, defaulting to numbers and then using \notag is messy; i prefer readable
code, even if it takes more bytes; inventing a formula takes more time than
keying it in. Also, more structure, means more hooks for configurability
Fine by me. Your method is perfectly acceptable.
much if this 'complicated' math is not that complicated to support,see
attached file
Wonderful. I did not know that something like this can be done so
easily in context.
i'm willing to implement anything reasonable but since i hardly use such
math i only act on 'i want to achieve this' kind of specs (i have no time to
read tons of tex documents)
Here are features that I would want context math to have. I do not
care about the input syntax (whether it is same as latex or not) as
long as the features are there.
1. Have align support with variable number of columns.
a &= b
&= c &+ d
& &+ e
should be typeset as
a = b
= c + d
+ e
2. Have a mechanism to individually number/not-number an equation.
3. Have a gather environment. Depending on the user option should
either center, left justify or right justify all equations. Useful
when you have a bunch of equation together and do not want to have
startforumla and stopformula after each of them.
4. In align you should be able to specify the separation between
columns. There should be some input syntax that allows you to typeset
an output like
a = b c = d
e = f g = h
It will be great if you can number each equation (i.e. four number in
the above example). There should be an option to only number each
line.
5. have a splitformula environment that allows
a =& b
& + c \\
& + d
to come out as
a = b
+ c
+ e (1)
with only one formula number. The formula number should be at the last
line or the center of the whole formula, configurable by an option.
6. Allow, someway of typesetting
a = b + c
Using some result
= d + e
that is, you should be able to come out of the align mode temporarily
and then go back. Latex calls this intertext. Have some means to
adjust the before and after skips of intertext. Something like
\setupintertextskip[small or medium or big]
7. Allow some way of typesetting multilined formula where
first line is left aligned
second line after some hskip
third line after some hskip
...
last line right alinged
This should have only one formula number, either on the last line or
in the center of the display.
8. Have a version of align, gather and multiline that can be used
inside a formula. So one should be able to type
\startformula
\left.\startaligned
\NC a \NC= b \NR
\NC c \NC= d \NR
\stopaligned\right\}
\implies
\startaligned
\NC b \NC= a \NR
\NC d \NC= c \NR
\stopaligned
\stopformula
to get
a = b } => b = a
c = d } d = c
where the implies is centered between the two lined.
Have an option to make these environments come at the top, middle or
bottom of the baseline.
9. Allow easy input of multiline subscripts. Suppose I want
\sum
a < b
c < d
e < f
10. Allow the big subscripts of math operators to be smashed to the
left or right. Suppse, I have
a \times \lim_{a very long equation} b_n
There should be a command, say \smashoperator such that
a \times \smashoperator\lim_{a very long equation} b_n
comes as
a lim b_n
a very long eq
where (a very long equation) in centered beneath the center of lim but
the "bounding box" is the bb of lim not the bb of the subscript
Also
a \times \smashoperator[r]\lim_{a very long equation} b_n
should come as
a lim b_n
a very lone eq
where the "bounding box" of a lim on the right is the bb of the lim,
on the left is the bb of the subscript.
Similarly of \smashoperator[l]
11. Have commands like \medop and \bigop which typeset the following
operator slightly smaller or slightly larger.
12. Have a command say \novheight (or whatever) so that while typing
\left\{\novheight \sum_{i=0}^n a_n \right\}
the braces do not take the size of the sum into account while scaling.
13. Have a command say \tag so that
\startformula
a = b \tag{*}
\stopformula
comes out as
a = b (*)
14. Allow a framed command that works with align and aligned. So that
a \implies\mframed{ \startaligned
\NC b \NC= c \NR
\NC e \NC= f \NR
\NC g \NC= h \NR
\stopaligned}
Comes as
+---------+
| b = c |
a => | e = f |
| g = h |
+---------+
15. Automatic numbering in subequations. In the attachment that you
sent, one has to number the subequations by hand. The trouble with
this is that if you rearrange the equations at a later stage, you
need to keep track of equation subnumbering.
These are all that I can think of right now. All these features are
available in latex. It will be great if context can support these
features (or a subset of thereof). I promise to document them if they
get incorporated :-)
Aditya
--
Aditya Mahajan, EECS Systems, University of Michigan
http://www.eecs.umich.edu/~adityam || Ph: 7342624008
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