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Warn me when the equation number is pushed to the next line

aligning a multiline formula with the bullet of itemizeLeft aligning equations without align characterAn embarrassing Multline errorAdjusting the width of a displaymath environmentList of equations, including equation contents and captionHow to Position the Equation Number in beginequation environment for a parametric equation ( i.e. x = { a or b )How continue a equation next lineVertically center equation number in aligned equationAlign equations within one linemapsto and function definition / definition environment

6

Is it possible to let amsmath warn me when the equation is too long and pushes the number to the next line?

I expect either it prints Equation (1) too long to console or it makes the (1) part red.

documentclass[twocolumn]article

usepackageamsmath

begindocument

 beginequation
 A+B+C+D+R+F+G+H+I+J+L+M+N+O+P
 endequation

enddocument

equations amsmath

share|improve this question

edited 1 hour ago

Symbol 1

asked 2 hours ago

Symbol 1Symbol 1

25.5k240122

add a comment | 

6

Is it possible to let amsmath warn me when the equation is too long and pushes the number to the next line?

I expect either it prints Equation (1) too long to console or it makes the (1) part red.

documentclass[twocolumn]article

usepackageamsmath

begindocument

 beginequation
 A+B+C+D+R+F+G+H+I+J+L+M+N+O+P
 endequation

enddocument

equations amsmath

share|improve this question

edited 1 hour ago

Symbol 1

asked 2 hours ago

Symbol 1Symbol 1

25.5k240122

add a comment | 

Is it possible to let amsmath warn me when the equation is too long and pushes the number to the next line?

I expect either it prints Equation (1) too long to console or it makes the (1) part red.

documentclass[twocolumn]article

usepackageamsmath

begindocument

 beginequation
 A+B+C+D+R+F+G+H+I+J+L+M+N+O+P
 endequation

enddocument

equations amsmath

share|improve this question

edited 1 hour ago

Symbol 1

asked 2 hours ago

Symbol 1Symbol 1

25.5k240122

documentclass[twocolumn]article

usepackageamsmath

begindocument

 beginequation
 A+B+C+D+R+F+G+H+I+J+L+M+N+O+P
 endequation

enddocument

share|improve this question

edited 1 hour ago

Symbol 1

asked 2 hours ago

Symbol 1Symbol 1

25.5k240122

share|improve this question

edited 1 hour ago

Symbol 1

asked 2 hours ago

Symbol 1Symbol 1

25.5k240122

asked 2 hours ago

Symbol 1Symbol 1

25.5k240122

asked 2 hours ago

Symbol 1Symbol 1

25.5k240122

1 Answer
1

active

oldest

votes

3

I don't want to say it is impossible but it's definitely a hard problem, because amsmath relies on the eqno primitive to do this work for the equation environment.

hsize=8cm
$$A+B+C+D+R+F+G+H+I+J+L+M+N+O+Peqno(1)$$
bye

So the only way I see is to override the eqno primitive and measure the penalties to see whether the number will be flushed to the next line.

---

For the align family of environments it is a little easier because tag shifting is handled by macros, which you simply hook your custom error or warning into

documentclass[twocolumn]article

usepackageamsmath

makeatletter
defplace@tag%
 iftagsleft@
 kern-tagshift@
 if1shift@tagrow@relax
 errmessageEquation too wide%
 rlapvbox%
 normalbaselines
 boxz@
 vbox tolineht@%
 raise@tag
 %
 else
 rlapboxz@%
 fi
 kerndisplaywidth@
 else
 kern-tagshift@
 if1shift@tagrow@relax
 errmessageEquation too wide%
 llapvtop%
 raise@tag
 normalbaselines
 setbox@nenull
 dp@nelineht@
 box@ne
 boxz@
 %
 else
 llapboxz@%
 fi
 fi

makeatother


begindocument

 beginalign
 A+B+C+D+R+F+G+H+I+J+L+M+N+O+P
 endalign

enddocument

share|improve this answer

edited 47 mins ago

answered 55 mins ago

Henri MenkeHenri Menke

76.3k8167282

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Can we assume align gives the same result as equation does and throw things into align and test it? Or, test the height of vbox with and without eqno?
  
  – Symbol 1
  38 mins ago
  
  

  
  
  
  

add a comment | 

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3

I don't want to say it is impossible but it's definitely a hard problem, because amsmath relies on the eqno primitive to do this work for the equation environment.

hsize=8cm
$$A+B+C+D+R+F+G+H+I+J+L+M+N+O+Peqno(1)$$
bye

So the only way I see is to override the eqno primitive and measure the penalties to see whether the number will be flushed to the next line.

---

For the align family of environments it is a little easier because tag shifting is handled by macros, which you simply hook your custom error or warning into

documentclass[twocolumn]article

usepackageamsmath

makeatletter
defplace@tag%
 iftagsleft@
 kern-tagshift@
 if1shift@tagrow@relax
 errmessageEquation too wide%
 rlapvbox%
 normalbaselines
 boxz@
 vbox tolineht@%
 raise@tag
 %
 else
 rlapboxz@%
 fi
 kerndisplaywidth@
 else
 kern-tagshift@
 if1shift@tagrow@relax
 errmessageEquation too wide%
 llapvtop%
 raise@tag
 normalbaselines
 setbox@nenull
 dp@nelineht@
 box@ne
 boxz@
 %
 else
 llapboxz@%
 fi
 fi

makeatother


begindocument

 beginalign
 A+B+C+D+R+F+G+H+I+J+L+M+N+O+P
 endalign

enddocument

share|improve this answer

edited 47 mins ago

answered 55 mins ago

Henri MenkeHenri Menke

76.3k8167282

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Can we assume align gives the same result as equation does and throw things into align and test it? Or, test the height of vbox with and without eqno?
  
  – Symbol 1
  38 mins ago
  
  

  
  
  
  

add a comment | 

3

I don't want to say it is impossible but it's definitely a hard problem, because amsmath relies on the eqno primitive to do this work for the equation environment.

hsize=8cm
$$A+B+C+D+R+F+G+H+I+J+L+M+N+O+Peqno(1)$$
bye

So the only way I see is to override the eqno primitive and measure the penalties to see whether the number will be flushed to the next line.

---

For the align family of environments it is a little easier because tag shifting is handled by macros, which you simply hook your custom error or warning into

documentclass[twocolumn]article

usepackageamsmath

makeatletter
defplace@tag%
 iftagsleft@
 kern-tagshift@
 if1shift@tagrow@relax
 errmessageEquation too wide%
 rlapvbox%
 normalbaselines
 boxz@
 vbox tolineht@%
 raise@tag
 %
 else
 rlapboxz@%
 fi
 kerndisplaywidth@
 else
 kern-tagshift@
 if1shift@tagrow@relax
 errmessageEquation too wide%
 llapvtop%
 raise@tag
 normalbaselines
 setbox@nenull
 dp@nelineht@
 box@ne
 boxz@
 %
 else
 llapboxz@%
 fi
 fi

makeatother


begindocument

 beginalign
 A+B+C+D+R+F+G+H+I+J+L+M+N+O+P
 endalign

enddocument

share|improve this answer

edited 47 mins ago

answered 55 mins ago

Henri MenkeHenri Menke

76.3k8167282

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Can we assume align gives the same result as equation does and throw things into align and test it? Or, test the height of vbox with and without eqno?
  
  – Symbol 1
  38 mins ago
  
  

  
  
  
  

add a comment | 

I don't want to say it is impossible but it's definitely a hard problem, because amsmath relies on the eqno primitive to do this work for the equation environment.

hsize=8cm
$$A+B+C+D+R+F+G+H+I+J+L+M+N+O+Peqno(1)$$
bye

So the only way I see is to override the eqno primitive and measure the penalties to see whether the number will be flushed to the next line.

---

For the align family of environments it is a little easier because tag shifting is handled by macros, which you simply hook your custom error or warning into

documentclass[twocolumn]article

usepackageamsmath

makeatletter
defplace@tag%
 iftagsleft@
 kern-tagshift@
 if1shift@tagrow@relax
 errmessageEquation too wide%
 rlapvbox%
 normalbaselines
 boxz@
 vbox tolineht@%
 raise@tag
 %
 else
 rlapboxz@%
 fi
 kerndisplaywidth@
 else
 kern-tagshift@
 if1shift@tagrow@relax
 errmessageEquation too wide%
 llapvtop%
 raise@tag
 normalbaselines
 setbox@nenull
 dp@nelineht@
 box@ne
 boxz@
 %
 else
 llapboxz@%
 fi
 fi

makeatother


begindocument

 beginalign
 A+B+C+D+R+F+G+H+I+J+L+M+N+O+P
 endalign

enddocument

share|improve this answer

edited 47 mins ago

answered 55 mins ago

Henri MenkeHenri Menke

76.3k8167282

hsize=8cm
$$A+B+C+D+R+F+G+H+I+J+L+M+N+O+Peqno(1)$$
bye

documentclass[twocolumn]article

usepackageamsmath

makeatletter
defplace@tag%
 iftagsleft@
 kern-tagshift@
 if1shift@tagrow@relax
 errmessageEquation too wide%
 rlapvbox%
 normalbaselines
 boxz@
 vbox tolineht@%
 raise@tag
 %
 else
 rlapboxz@%
 fi
 kerndisplaywidth@
 else
 kern-tagshift@
 if1shift@tagrow@relax
 errmessageEquation too wide%
 llapvtop%
 raise@tag
 normalbaselines
 setbox@nenull
 dp@nelineht@
 box@ne
 boxz@
 %
 else
 llapboxz@%
 fi
 fi

makeatother


begindocument

 beginalign
 A+B+C+D+R+F+G+H+I+J+L+M+N+O+P
 endalign

enddocument

share|improve this answer

edited 47 mins ago

answered 55 mins ago

Henri MenkeHenri Menke

76.3k8167282

answered 55 mins ago

Henri MenkeHenri Menke

76.3k8167282

answered 55 mins ago

Henri MenkeHenri Menke

76.3k8167282