Re: What symbol for Fourier transform?
Olivier Ripoll wrote: > I attach to this mail my layout module to add some common math functions to > LyX. Drop it to you layout folder(*), reconfigure, and add it to the file > via the document settings. Then all you need is to type \FT for it and \iFT > for the inverse Fourier transform. what about putting into wiki modules page? pavel
Re: What symbol for Fourier transform?
On 2009-09-16, Olivier Ripoll wrote:
> Uwe Stöhr wrote:
>> Olivier Ripoll schrieb:
>>> What you want to get the really nice Fourier symbol is "\mathscr{F}",
>>> the "script" F. It is visible as number 2131 in this unicode chart
>>> http://www.unicode.org/charts/PDF/U2100.pdf
>> Thanks for the info, I wasn't aware of that character. The character is
>> nevertheless unfortunately not available in Windows' standard fonts like
>> Arial or Times New Roman. Even none of the fonts I have installed
>> support this character. This might be the reason why is character is
>> rarely used.
> It works for me through:
> insert->special characters->symbols...->Letterlike Symbols
> I'm using the "Times New Roman", "Arial" and "Courier New" fonts for the
> LyX interface. It looks however better with Déjà Vu fonts than with MS
> fonts in LyX.
> So who that allow to have the Fourier transform character displayed in
> LyX with my module instead of \FT latex code ?
If you define a math-macro, you can separately define the LaTeX command and
the look-in-lyx. Unfortunately,
* you can't define a math-macro in a module,
* you can't define a preamble command in a LyX file.
This is why I have a file full of math macros which I include in all my
math-heavy publications. Instead of the preamble command \MathOperator, I use
e.g. \operatorname{sgn} as LaTeX command. View>Source shows this as
\global\long\def\sgn{\operatorname{sgn}}
\global\long\def\Re{\operatorname{Re}}
\global\long\def\Im{\operatorname{Im}}
...
Günter
Re: What symbol for Fourier transform?
Uwe Stöhr wrote:
Olivier Ripoll schrieb:
What you want to get the really nice Fourier symbol is "\mathscr{F}",
the "script" F. It is visible as number 2131 in this unicode chart
http://www.unicode.org/charts/PDF/U2100.pdf
Thanks for the info, I wasn't aware of that character. The character is
nevertheless unfortunately not available in Windows' standard fonts like
Arial or Times New Roman. Even none of the fonts I have installed
support this character. This might be the reason why is character is
rarely used.
It works for me through:
insert->special characters->symbols...->Letterlike Symbols
I'm using the "Times New Roman", "Arial" and "Courier New" fonts for the
LyX interface. It looks however better with Déjà Vu fonts than with MS
fonts in LyX.
So who that allow to have the Fourier transform character displayed in
LyX with my module instead of \FT latex code ?
Best regards,
Olivier
regards Uwe
Re: What symbol for Fourier transform?
Olivier Ripoll schrieb:
What you want to get the really nice Fourier symbol is "\mathscr{F}",
the "script" F. It is visible as number 2131 in this unicode chart
http://www.unicode.org/charts/PDF/U2100.pdf
Thanks for the info, I wasn't aware of that character. The character is nevertheless unfortunately
not available in Windows' standard fonts like Arial or Times New Roman. Even none of the fonts I
have installed support this character. This might be the reason why is character is rarely used.
regards Uwe
Re: What symbol for Fourier transform?
Neal Becker wrote:
What do you usually use for Fourier transform? Calligraphic F, or maybe
something else?
Hi,
Calligraphic F is not the right symbol, although it seems more and more
used now :-( (probably because people don't find the correct one, at
least that was my case in the past).
What you want to get the really nice Fourier symbol is "\mathscr{F}",
the "script" F. It is visible as number 2131 in this unicode chart
http://www.unicode.org/charts/PDF/U2100.pdf
You'll need some additional packages:
amsmath and (IIRC) mathrsfs.
I attach to this mail my layout module to add some common math functions
to LyX. Drop it to you layout folder(*), reconfigure, and add it to the
file via the document settings. Then all you need is to type \FT for it
and \iFT for the inverse Fourier transform.
You can also just pick the interesting code and drop it to the preamble
Best regards,
Olivier
(*)On Windows, it would be something like
C:\Documents and Settings\yourusername\Application Data\lyx16\layouts
on Linux, something like
/home/username/.lyx/layouts
#\DeclareLyXModule{More Maths Functions}
#DescriptionBegin
#Additional functions: erf, erfc, sinc, sgn , missing hyperbolic & inverse
hyperbolic functions,
#Fourier transform & inverse, logarithms in base 10 and 2, floor/ceil (letters
and mathematical
#notation).
#DescriptionEnd
# Author : Olivier Ripoll
Format 11
Requiresamsmath,mathrsfs
AddToPreamble
\DeclareMathOperator{\sinc}{sinc}
\DeclareMathOperator{\sgn}{sgn}
\DeclareMathOperator{\erf}{erf}
\DeclareMathOperator{\erfc}{erfc}
\DeclareMathOperator{\FT}{\mathscr{F}}
\DeclareMathOperator{\iFT}{\mathscr{F}^{-1}}
\DeclareMathOperator{\logten}{log_{10}}
\DeclareMathOperator{\logtwo}{log_2}
\DeclareMathOperator{\sech}{sech}
\DeclareMathOperator{\csch}{csch}
\DeclareMathOperator{\arsinh}{arsinh}
\DeclareMathOperator{\arcosh}{arcosh}
\DeclareMathOperator{\artanh}{artanh}
\DeclareMathOperator{\arcoth}{arcoth}
\DeclareMathOperator{\arsech}{arsech}
\DeclareMathOperator{\arcsch}{arcsch}
\newcommand{\Floor}[1]
{\left\lfloor {#1} \right\rfloor}
\DeclareMathOperator{\floor}{floor}
\newcommand{\Ceil}[1]
{\left\lceil #1 \right\rceil}
\DeclareMathOperator{\ceil}{ceil}
EndPreamble
Re: What symbol for Fourier transform?
Neal Becker schrieb:
What do you usually use for Fourier transform? Calligraphic F, or maybe
something else?
Usually a calligraphic F is used. In principle there is no rule for the symbol so you can define
what you want. A list of possible notations is given in
http://en.wikipedia.org/wiki/Fourier_transform#Other_notations
Interestingly, the English Wikipedia is using \hat{f} as symbol that I haven't
seen yet in literature.
regards Uwe
What symbol for Fourier transform?
What do you usually use for Fourier transform? Calligraphic F, or maybe something else?
