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fontspec breaks capital greek letters in DeclareMathOperator

Wedge Power symbolReplacing greek glyphs in math modeunicode-math breaks DeclareMathOperatorHow can I write curly capital Greek lettersProblem With Capital Greek Letterssetmainfont breaks DeclareMathOperatoraccent on capital Greek lettersDefine command for variable and use of capital Greek lettersDeclareMathOperator with capital Greek letterProblem with bold font of capital greek lettersnon-italic capital greek letters

5

1

Using fontspec together with amsmath breaks the use of capital greek letters in DeclareMathOperator. Instead, the greek letter just is omitted.

Here is a minimal working example:

%! TEX program = xelatex

documentclass{article}



usepackage{fontspec}

usepackage{amsmath}



DeclareMathOperator{exterior}{Lambda}



begin{document}

begin{align*}

    exterior^k V \

    Lambda^k V

end{align*}

end{document}

This is the output:

Removing usepackage{fontspec} makes the Lambda appear.

Funnily enough, if one also adds unicode-math in the mix, i.e.

usepackage{fontspec}

usepackage{unicode-math}

usepackage{amsmath}

it works. But unicode-math recommends to load it after amsmath, so it can override commands. Though this breaks it again, which is really confusing to me.

Is there a sensible way to use fontspec and amsmath together? Did I miss something?

math-mode xetex amsmath fontspec greek

share|improve this question

edited 7 hours ago

Sebastiano

10.4k42060

asked 10 hours ago

red_trumpetred_trumpet

20629

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Alternatively, you could typeset the operator using a properly changed variant of wedge as shown here. (I guess that the convention of using Lambda for exterior product space powers is due to laziness, not semactics... using wedge seems more consistent to me.)
  
  – phg
  2 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Yeah I actually came from this. Though mostly the symbol is too big for my taste (e.g. bigwedge), or does not scale in subscripts (e.g. the solution using mbox). I also do not understand the more involved solutions, and am not particularly keen to add those.
  
  – red_trumpet
  2 hours ago
  
  
  

  
  
  
  

add a comment | 

5

1

Using fontspec together with amsmath breaks the use of capital greek letters in DeclareMathOperator. Instead, the greek letter just is omitted.

Here is a minimal working example:

%! TEX program = xelatex

documentclass{article}



usepackage{fontspec}

usepackage{amsmath}



DeclareMathOperator{exterior}{Lambda}



begin{document}

begin{align*}

    exterior^k V \

    Lambda^k V

end{align*}

end{document}

This is the output:

Removing usepackage{fontspec} makes the Lambda appear.

Funnily enough, if one also adds unicode-math in the mix, i.e.

usepackage{fontspec}

usepackage{unicode-math}

usepackage{amsmath}

it works. But unicode-math recommends to load it after amsmath, so it can override commands. Though this breaks it again, which is really confusing to me.

Is there a sensible way to use fontspec and amsmath together? Did I miss something?

math-mode xetex amsmath fontspec greek

share|improve this question

edited 7 hours ago

Sebastiano

10.4k42060

asked 10 hours ago

red_trumpetred_trumpet

20629

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Alternatively, you could typeset the operator using a properly changed variant of wedge as shown here. (I guess that the convention of using Lambda for exterior product space powers is due to laziness, not semactics... using wedge seems more consistent to me.)
  
  – phg
  2 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Yeah I actually came from this. Though mostly the symbol is too big for my taste (e.g. bigwedge), or does not scale in subscripts (e.g. the solution using mbox). I also do not understand the more involved solutions, and am not particularly keen to add those.
  
  – red_trumpet
  2 hours ago
  
  
  

  
  
  
  

add a comment | 

Using fontspec together with amsmath breaks the use of capital greek letters in DeclareMathOperator. Instead, the greek letter just is omitted.

Here is a minimal working example:

%! TEX program = xelatex

documentclass{article}



usepackage{fontspec}

usepackage{amsmath}



DeclareMathOperator{exterior}{Lambda}



begin{document}

begin{align*}

    exterior^k V \

    Lambda^k V

end{align*}

end{document}

This is the output:

Removing usepackage{fontspec} makes the Lambda appear.

Funnily enough, if one also adds unicode-math in the mix, i.e.

usepackage{fontspec}

usepackage{unicode-math}

usepackage{amsmath}

it works. But unicode-math recommends to load it after amsmath, so it can override commands. Though this breaks it again, which is really confusing to me.

Is there a sensible way to use fontspec and amsmath together? Did I miss something?

math-mode xetex amsmath fontspec greek

share|improve this question

edited 7 hours ago

Sebastiano

10.4k42060

asked 10 hours ago

red_trumpetred_trumpet

20629

%! TEX program = xelatex

documentclass{article}



usepackage{fontspec}

usepackage{amsmath}



DeclareMathOperator{exterior}{Lambda}



begin{document}

begin{align*}

    exterior^k V \

    Lambda^k V

end{align*}

end{document}

usepackage{fontspec}

usepackage{unicode-math}

usepackage{amsmath}

share|improve this question

edited 7 hours ago

Sebastiano

10.4k42060

asked 10 hours ago

red_trumpetred_trumpet

20629

share|improve this question

edited 7 hours ago

Sebastiano

10.4k42060

asked 10 hours ago

red_trumpetred_trumpet

20629

edited 7 hours ago

Sebastiano

10.4k42060

edited 7 hours ago

Sebastiano

10.4k42060

asked 10 hours ago

red_trumpetred_trumpet

20629

asked 10 hours ago

red_trumpetred_trumpet

20629

2 Answers
2

active

oldest

votes

7

DeclareMathOperator uses internally the operator font, and this is changed by fontspec. Why the new font does have a Lambda, it doesn't have it in the same glyph slot.

You could either load fontspec with the [no-math] option, or use the real glyph:

documentclass{article}

usepackage{amsmath}

usepackage{fontspec}



DeclareMathOperator{exterior}{Λ}

begin{document}





begin{align*}

    exterior^k V\

    Lambda^k V

end{align*}

end{document}

share|improve this answer

answered 7 hours ago

Ulrike FischerUlrike Fischer

194k8302687

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks. Any idea why the glyph slot is changed? That seems not very reasonable...
  
  – red_trumpet
  6 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  unicode engines and unicode fonts do change slots. You can't expect that a Lambda is at the same place in a OT1 legacy font than in unicode font.
  
  – Ulrike Fischer
  6 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @red_trumpet It’s a little complicated to go into in the comments. Traditionally, Lambda came from a special math-letter font in the legacy OML encoding. Then, amsmath operators set the font to operator@font and are really intended to typeset text like sin or log. If you load fontspec, it tries to enable modern fonts in text mode and still support legacy math fonts that contain Lambda. One thing it does is change operator@font to the text font. But it does this in such a way that Lambda doesn’t work. It ends up trying to load the wrong codepoint.
  
  – Davislor
  2 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @red_trumpet The solution is to use a different command to either load the Unicode character Λ from the operator font (the default, Latin Modern Roman, has it), or use a different math-mode command to get a Lambda. For example, mathnormalLambda overrides the operator font and works (although this is slanted by default), upLambda from unicode-math, Uplambda, Lambdaup, etc. from various legacy packages.
  
  – Davislor
  2 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @red_trumpet Another alternative is not to use DeclareMathOperator at all. You can just define it as mathop{Lambda} to get operator-like spacing.
  
  – Davislor
  2 hours ago
  

  
  
  
  

 | 
show 9 more comments

5

The definition of Lambda is mathchar"7003, which means that when operator@font is in effect, the glyph from slot 3 in that font is used, which doesn't exist.

You can avoid it with a trick:

documentclass{article}



usepackage{fontspec}

usepackage{amsmath}



newcommand{opgreek}[1]{begingroupmathgroup-1 #1endgroup}



DeclareMathOperator{exterior}{opgreek{Lambda}}



begin{document}



begin{align*}

    exterior^k V \

    Lambda^k V

end{align*}

end{document}

Otherwise

newcommand{exterior}{mathop{kern0ptLambda}}

share|improve this answer

answered 7 hours ago

egregegreg

724k8819173222

add a comment | 

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7

DeclareMathOperator uses internally the operator font, and this is changed by fontspec. Why the new font does have a Lambda, it doesn't have it in the same glyph slot.

You could either load fontspec with the [no-math] option, or use the real glyph:

documentclass{article}

usepackage{amsmath}

usepackage{fontspec}



DeclareMathOperator{exterior}{Λ}

begin{document}





begin{align*}

    exterior^k V\

    Lambda^k V

end{align*}

end{document}

share|improve this answer

answered 7 hours ago

Ulrike FischerUlrike Fischer

194k8302687

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks. Any idea why the glyph slot is changed? That seems not very reasonable...
  
  – red_trumpet
  6 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  unicode engines and unicode fonts do change slots. You can't expect that a Lambda is at the same place in a OT1 legacy font than in unicode font.
  
  – Ulrike Fischer
  6 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @red_trumpet It’s a little complicated to go into in the comments. Traditionally, Lambda came from a special math-letter font in the legacy OML encoding. Then, amsmath operators set the font to operator@font and are really intended to typeset text like sin or log. If you load fontspec, it tries to enable modern fonts in text mode and still support legacy math fonts that contain Lambda. One thing it does is change operator@font to the text font. But it does this in such a way that Lambda doesn’t work. It ends up trying to load the wrong codepoint.
  
  – Davislor
  2 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @red_trumpet The solution is to use a different command to either load the Unicode character Λ from the operator font (the default, Latin Modern Roman, has it), or use a different math-mode command to get a Lambda. For example, mathnormalLambda overrides the operator font and works (although this is slanted by default), upLambda from unicode-math, Uplambda, Lambdaup, etc. from various legacy packages.
  
  – Davislor
  2 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @red_trumpet Another alternative is not to use DeclareMathOperator at all. You can just define it as mathop{Lambda} to get operator-like spacing.
  
  – Davislor
  2 hours ago
  

  
  
  
  

 | 
show 9 more comments

7

DeclareMathOperator uses internally the operator font, and this is changed by fontspec. Why the new font does have a Lambda, it doesn't have it in the same glyph slot.

You could either load fontspec with the [no-math] option, or use the real glyph:

documentclass{article}

usepackage{amsmath}

usepackage{fontspec}



DeclareMathOperator{exterior}{Λ}

begin{document}





begin{align*}

    exterior^k V\

    Lambda^k V

end{align*}

end{document}

share|improve this answer

answered 7 hours ago

Ulrike FischerUlrike Fischer

194k8302687

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks. Any idea why the glyph slot is changed? That seems not very reasonable...
  
  – red_trumpet
  6 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  unicode engines and unicode fonts do change slots. You can't expect that a Lambda is at the same place in a OT1 legacy font than in unicode font.
  
  – Ulrike Fischer
  6 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @red_trumpet It’s a little complicated to go into in the comments. Traditionally, Lambda came from a special math-letter font in the legacy OML encoding. Then, amsmath operators set the font to operator@font and are really intended to typeset text like sin or log. If you load fontspec, it tries to enable modern fonts in text mode and still support legacy math fonts that contain Lambda. One thing it does is change operator@font to the text font. But it does this in such a way that Lambda doesn’t work. It ends up trying to load the wrong codepoint.
  
  – Davislor
  2 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @red_trumpet The solution is to use a different command to either load the Unicode character Λ from the operator font (the default, Latin Modern Roman, has it), or use a different math-mode command to get a Lambda. For example, mathnormalLambda overrides the operator font and works (although this is slanted by default), upLambda from unicode-math, Uplambda, Lambdaup, etc. from various legacy packages.
  
  – Davislor
  2 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @red_trumpet Another alternative is not to use DeclareMathOperator at all. You can just define it as mathop{Lambda} to get operator-like spacing.
  
  – Davislor
  2 hours ago
  

  
  
  
  

 | 
show 9 more comments

DeclareMathOperator uses internally the operator font, and this is changed by fontspec. Why the new font does have a Lambda, it doesn't have it in the same glyph slot.

You could either load fontspec with the [no-math] option, or use the real glyph:

documentclass{article}

usepackage{amsmath}

usepackage{fontspec}



DeclareMathOperator{exterior}{Λ}

begin{document}





begin{align*}

    exterior^k V\

    Lambda^k V

end{align*}

end{document}

share|improve this answer

answered 7 hours ago

Ulrike FischerUlrike Fischer

194k8302687

documentclass{article}

usepackage{amsmath}

usepackage{fontspec}



DeclareMathOperator{exterior}{Λ}

begin{document}





begin{align*}

    exterior^k V\

    Lambda^k V

end{align*}

end{document}

share|improve this answer

answered 7 hours ago

Ulrike FischerUlrike Fischer

194k8302687

answered 7 hours ago

Ulrike FischerUlrike Fischer

194k8302687

answered 7 hours ago

Ulrike FischerUlrike Fischer

194k8302687

5

The definition of Lambda is mathchar"7003, which means that when operator@font is in effect, the glyph from slot 3 in that font is used, which doesn't exist.

You can avoid it with a trick:

documentclass{article}



usepackage{fontspec}

usepackage{amsmath}



newcommand{opgreek}[1]{begingroupmathgroup-1 #1endgroup}



DeclareMathOperator{exterior}{opgreek{Lambda}}



begin{document}



begin{align*}

    exterior^k V \

    Lambda^k V

end{align*}

end{document}

Otherwise

newcommand{exterior}{mathop{kern0ptLambda}}

share|improve this answer

answered 7 hours ago

egregegreg

724k8819173222

add a comment | 

5

The definition of Lambda is mathchar"7003, which means that when operator@font is in effect, the glyph from slot 3 in that font is used, which doesn't exist.

You can avoid it with a trick:

documentclass{article}



usepackage{fontspec}

usepackage{amsmath}



newcommand{opgreek}[1]{begingroupmathgroup-1 #1endgroup}



DeclareMathOperator{exterior}{opgreek{Lambda}}



begin{document}



begin{align*}

    exterior^k V \

    Lambda^k V

end{align*}

end{document}

Otherwise

newcommand{exterior}{mathop{kern0ptLambda}}

share|improve this answer

answered 7 hours ago

egregegreg

724k8819173222

add a comment | 

The definition of Lambda is mathchar"7003, which means that when operator@font is in effect, the glyph from slot 3 in that font is used, which doesn't exist.

You can avoid it with a trick:

documentclass{article}



usepackage{fontspec}

usepackage{amsmath}



newcommand{opgreek}[1]{begingroupmathgroup-1 #1endgroup}



DeclareMathOperator{exterior}{opgreek{Lambda}}



begin{document}



begin{align*}

    exterior^k V \

    Lambda^k V

end{align*}

end{document}

Otherwise

newcommand{exterior}{mathop{kern0ptLambda}}

share|improve this answer

answered 7 hours ago

egregegreg

724k8819173222

documentclass{article}



usepackage{fontspec}

usepackage{amsmath}



newcommand{opgreek}[1]{begingroupmathgroup-1 #1endgroup}



DeclareMathOperator{exterior}{opgreek{Lambda}}



begin{document}



begin{align*}

    exterior^k V \

    Lambda^k V

end{align*}

end{document}

newcommand{exterior}{mathop{kern0ptLambda}}

share|improve this answer

answered 7 hours ago

egregegreg

724k8819173222

answered 7 hours ago

egregegreg

724k8819173222

answered 7 hours ago

egregegreg

724k8819173222