Underbrace in equation makes expression a bit too big

up vote
3
down vote

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I have an expression with an underbrace, where the parenthesis and a second partial devirative gets a little to big.
Here is the code:

beginfleqn beginalign* frac1v_G = frac1v_ph cdot left(frac1 - fraclambdan fracpartial npartial lambda1 - left(fraclambdan right)^2 underbracefracpartial^2 npartial lambda^2_=0 right) = frac1v_ph cdot left( 1 - fraclambdan fracpartial npartial lambda right) endalign* endfleqn

and here the result:

enter image description here

How can I adjust the code so that the second order partial derivative is as big as the term over the fractionline ?

I'm thankful for your answers!

asked 26 mins ago

astronerd

161

New contributor

1

Welcome to TeX.SX! The simplest would be removing the big parentheses which are redundant. But also the underbrace needs a fix.
â€“Â egreg
23 mins ago

add a commentÂ |Â

up vote
3
down vote

favorite

I have an expression with an underbrace, where the parenthesis and a second partial devirative gets a little to big.
Here is the code:

and here the result:

enter image description here

How can I adjust the code so that the second order partial derivative is as big as the term over the fractionline ?

I'm thankful for your answers!

asked 26 mins ago

astronerd

161

New contributor

1

Welcome to TeX.SX! The simplest would be removing the big parentheses which are redundant. But also the underbrace needs a fix.
â€“Â egreg
23 mins ago

add a commentÂ |Â

up vote
3
down vote

favorite

I have an expression with an underbrace, where the parenthesis and a second partial devirative gets a little to big.
Here is the code:

and here the result:

enter image description here

How can I adjust the code so that the second order partial derivative is as big as the term over the fractionline ?

I'm thankful for your answers!

asked 26 mins ago

astronerd

161

New contributor

I have an expression with an underbrace, where the parenthesis and a second partial devirative gets a little to big.
Here is the code:

and here the result:

enter image description here

How can I adjust the code so that the second order partial derivative is as big as the term over the fractionline ?

I'm thankful for your answers!

underbrace

asked 26 mins ago

astronerd

161

New contributor

asked 26 mins ago

astronerd

161

New contributor

asked 26 mins ago

astronerd

161

New contributor

asked 26 mins ago

astronerd

161

asked 26 mins ago

astronerd

161

New contributor

astronerd is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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1

Welcome to TeX.SX! The simplest would be removing the big parentheses which are redundant. But also the underbrace needs a fix.
â€“Â egreg
23 mins ago

add a commentÂ |Â

1

Welcome to TeX.SX! The simplest would be removing the big parentheses which are redundant. But also the underbrace needs a fix.
â€“Â egreg
23 mins ago

Welcome to TeX.SX! The simplest would be removing the big parentheses which are redundant. But also the underbrace needs a fix.
â€“Â egreg
23 mins ago

add a commentÂ |Â

2 Answers
2

active

oldest

votes

up vote
3
down vote

I would simply omit those redundant parentheses. And most certainly fix the size of the underbrace object.

It's also possible (but requires a phantom) to have the right size for the parentheses:

documentclassarticle
usepackageamsmath

makeatletter
newcommandfixedunderbrace[2]mathpalettefixed@underbrace#1#2
newcommandfixed@underbrace[2]fixed@@underbrace#1#2
newcommandfixed@@underbrace[3]underbrace#1#2_#3
makeatother

begindocument

beginequation*
frac1v_G =
frac1v_ph cdot 
 frac1 - fraclambdan fracpartial npartial lambda
 1 - left(fraclambdan right)^2
 fixedunderbracefracpartial^2 npartial lambda^2=0
= frac1v_ph cdot 
 left( 1 - fraclambdan fracpartial npartial lambda right) 
endequation*

beginequation*
frac1v_G =
frac1v_ph cdot 
 left(
 frac1 - fraclambdan fracpartial npartial lambda
 1 - left(fraclambdan right)^2
 smash[b]fixedunderbracefracpartial^2 npartial lambda^2=0
 right)
 vphantom
 frac1 - fraclambdan fracpartial npartial lambda
 1 - left(fraclambdan right)^2
 fixedunderbracefracpartial^2 npartial lambda^2=0
 
= frac1v_ph cdot 
 left( 1 - fraclambdan fracpartial npartial lambda right) 
endequation*

enddocument

enter image description here

answered 6 mins ago

egreg

694k8518443099

With mathlap or something like that command is also possible?
â€“Â manooooh
3 mins ago

add a commentÂ |Â

up vote
2
down vote

Some suggestions (the first two of which have already been made by @egreg):

Omit the large parentheses entirely. They seem to satisfy no useful purpose.

Use tfrac (or: textstylefrac) instead of frac in the first argument of underbrace. (By default, the first argument of underbrace is processed in display-style math mode. However, the remainder of the denominator is processed in text style, not display style.)

Omit all cdot directives. They achieve little but clutter up the appearance of the equation.

For better horizontal spacing as well as for more typographically-appropriate sizing of the parentheses in the final part of the equation, use Bigl( and Bigr) instead of left( and right).

enter image description here

documentclassarticle
usepackageamsmath % for "tfrac" macro
begindocument
[
frac1v_G 
= frac1v_ph 
frac1 - fraclambdan fracpartial npartial lambda%
 1 - bigl(fraclambdan bigr)^!2 !
underbracetfracpartial^2 npartiallambda^2_=0
= frac1v_ph Bigl( 1 - fraclambdan 
 fracpartial npartial lambda Bigr)
]
enddocument

answered 3 mins ago

Mico

267k30362747

add a commentÂ |Â

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

up vote
3
down vote

I would simply omit those redundant parentheses. And most certainly fix the size of the underbrace object.

It's also possible (but requires a phantom) to have the right size for the parentheses:

documentclassarticle
usepackageamsmath

makeatletter
newcommandfixedunderbrace[2]mathpalettefixed@underbrace#1#2
newcommandfixed@underbrace[2]fixed@@underbrace#1#2
newcommandfixed@@underbrace[3]underbrace#1#2_#3
makeatother

begindocument

beginequation*
frac1v_G =
frac1v_ph cdot 
 frac1 - fraclambdan fracpartial npartial lambda
 1 - left(fraclambdan right)^2
 fixedunderbracefracpartial^2 npartial lambda^2=0
= frac1v_ph cdot 
 left( 1 - fraclambdan fracpartial npartial lambda right) 
endequation*

beginequation*
frac1v_G =
frac1v_ph cdot 
 left(
 frac1 - fraclambdan fracpartial npartial lambda
 1 - left(fraclambdan right)^2
 smash[b]fixedunderbracefracpartial^2 npartial lambda^2=0
 right)
 vphantom
 frac1 - fraclambdan fracpartial npartial lambda
 1 - left(fraclambdan right)^2
 fixedunderbracefracpartial^2 npartial lambda^2=0
 
= frac1v_ph cdot 
 left( 1 - fraclambdan fracpartial npartial lambda right) 
endequation*

enddocument

enter image description here

answered 6 mins ago

egreg

694k8518443099

With mathlap or something like that command is also possible?
â€“Â manooooh
3 mins ago

add a commentÂ |Â

up vote
3
down vote

I would simply omit those redundant parentheses. And most certainly fix the size of the underbrace object.

It's also possible (but requires a phantom) to have the right size for the parentheses:

documentclassarticle
usepackageamsmath

makeatletter
newcommandfixedunderbrace[2]mathpalettefixed@underbrace#1#2
newcommandfixed@underbrace[2]fixed@@underbrace#1#2
newcommandfixed@@underbrace[3]underbrace#1#2_#3
makeatother

begindocument

beginequation*
frac1v_G =
frac1v_ph cdot 
 frac1 - fraclambdan fracpartial npartial lambda
 1 - left(fraclambdan right)^2
 fixedunderbracefracpartial^2 npartial lambda^2=0
= frac1v_ph cdot 
 left( 1 - fraclambdan fracpartial npartial lambda right) 
endequation*

beginequation*
frac1v_G =
frac1v_ph cdot 
 left(
 frac1 - fraclambdan fracpartial npartial lambda
 1 - left(fraclambdan right)^2
 smash[b]fixedunderbracefracpartial^2 npartial lambda^2=0
 right)
 vphantom
 frac1 - fraclambdan fracpartial npartial lambda
 1 - left(fraclambdan right)^2
 fixedunderbracefracpartial^2 npartial lambda^2=0
 
= frac1v_ph cdot 
 left( 1 - fraclambdan fracpartial npartial lambda right) 
endequation*

enddocument

enter image description here

answered 6 mins ago

egreg

694k8518443099

With mathlap or something like that command is also possible?
â€“Â manooooh
3 mins ago

add a commentÂ |Â

up vote
3
down vote

I would simply omit those redundant parentheses. And most certainly fix the size of the underbrace object.

It's also possible (but requires a phantom) to have the right size for the parentheses:

documentclassarticle
usepackageamsmath

makeatletter
newcommandfixedunderbrace[2]mathpalettefixed@underbrace#1#2
newcommandfixed@underbrace[2]fixed@@underbrace#1#2
newcommandfixed@@underbrace[3]underbrace#1#2_#3
makeatother

begindocument

beginequation*
frac1v_G =
frac1v_ph cdot 
 frac1 - fraclambdan fracpartial npartial lambda
 1 - left(fraclambdan right)^2
 fixedunderbracefracpartial^2 npartial lambda^2=0
= frac1v_ph cdot 
 left( 1 - fraclambdan fracpartial npartial lambda right) 
endequation*

beginequation*
frac1v_G =
frac1v_ph cdot 
 left(
 frac1 - fraclambdan fracpartial npartial lambda
 1 - left(fraclambdan right)^2
 smash[b]fixedunderbracefracpartial^2 npartial lambda^2=0
 right)
 vphantom
 frac1 - fraclambdan fracpartial npartial lambda
 1 - left(fraclambdan right)^2
 fixedunderbracefracpartial^2 npartial lambda^2=0
 
= frac1v_ph cdot 
 left( 1 - fraclambdan fracpartial npartial lambda right) 
endequation*

enddocument

enter image description here

answered 6 mins ago

egreg

694k8518443099

I would simply omit those redundant parentheses. And most certainly fix the size of the underbrace object.

It's also possible (but requires a phantom) to have the right size for the parentheses:

documentclassarticle
usepackageamsmath

makeatletter
newcommandfixedunderbrace[2]mathpalettefixed@underbrace#1#2
newcommandfixed@underbrace[2]fixed@@underbrace#1#2
newcommandfixed@@underbrace[3]underbrace#1#2_#3
makeatother

begindocument

beginequation*
frac1v_G =
frac1v_ph cdot 
 frac1 - fraclambdan fracpartial npartial lambda
 1 - left(fraclambdan right)^2
 fixedunderbracefracpartial^2 npartial lambda^2=0
= frac1v_ph cdot 
 left( 1 - fraclambdan fracpartial npartial lambda right) 
endequation*

beginequation*
frac1v_G =
frac1v_ph cdot 
 left(
 frac1 - fraclambdan fracpartial npartial lambda
 1 - left(fraclambdan right)^2
 smash[b]fixedunderbracefracpartial^2 npartial lambda^2=0
 right)
 vphantom
 frac1 - fraclambdan fracpartial npartial lambda
 1 - left(fraclambdan right)^2
 fixedunderbracefracpartial^2 npartial lambda^2=0
 
= frac1v_ph cdot 
 left( 1 - fraclambdan fracpartial npartial lambda right) 
endequation*

enddocument

enter image description here

answered 6 mins ago

egreg

694k8518443099

answered 6 mins ago

egreg

694k8518443099

answered 6 mins ago

egreg

694k8518443099

answered 6 mins ago

egreg

694k8518443099

With mathlap or something like that command is also possible?
â€“Â manooooh
3 mins ago

add a commentÂ |Â

With mathlap or something like that command is also possible?
â€“Â manooooh
3 mins ago

With mathlap or something like that command is also possible?
â€“Â manooooh
3 mins ago

add a commentÂ |Â

up vote
2
down vote

Some suggestions (the first two of which have already been made by @egreg):

Omit the large parentheses entirely. They seem to satisfy no useful purpose.

Use tfrac (or: textstylefrac) instead of frac in the first argument of underbrace. (By default, the first argument of underbrace is processed in display-style math mode. However, the remainder of the denominator is processed in text style, not display style.)

Omit all cdot directives. They achieve little but clutter up the appearance of the equation.

For better horizontal spacing as well as for more typographically-appropriate sizing of the parentheses in the final part of the equation, use Bigl( and Bigr) instead of left( and right).

enter image description here

documentclassarticle
usepackageamsmath % for "tfrac" macro
begindocument
[
frac1v_G 
= frac1v_ph 
frac1 - fraclambdan fracpartial npartial lambda%
 1 - bigl(fraclambdan bigr)^!2 !
underbracetfracpartial^2 npartiallambda^2_=0
= frac1v_ph Bigl( 1 - fraclambdan 
 fracpartial npartial lambda Bigr)
]
enddocument

answered 3 mins ago

Mico

267k30362747

add a commentÂ |Â

up vote
2
down vote

Some suggestions (the first two of which have already been made by @egreg):

Omit the large parentheses entirely. They seem to satisfy no useful purpose.

Use tfrac (or: textstylefrac) instead of frac in the first argument of underbrace. (By default, the first argument of underbrace is processed in display-style math mode. However, the remainder of the denominator is processed in text style, not display style.)

Omit all cdot directives. They achieve little but clutter up the appearance of the equation.

For better horizontal spacing as well as for more typographically-appropriate sizing of the parentheses in the final part of the equation, use Bigl( and Bigr) instead of left( and right).

enter image description here

documentclassarticle
usepackageamsmath % for "tfrac" macro
begindocument
[
frac1v_G 
= frac1v_ph 
frac1 - fraclambdan fracpartial npartial lambda%
 1 - bigl(fraclambdan bigr)^!2 !
underbracetfracpartial^2 npartiallambda^2_=0
= frac1v_ph Bigl( 1 - fraclambdan 
 fracpartial npartial lambda Bigr)
]
enddocument

answered 3 mins ago

Mico

267k30362747

add a commentÂ |Â

up vote
2
down vote

Some suggestions (the first two of which have already been made by @egreg):

Omit the large parentheses entirely. They seem to satisfy no useful purpose.

Use tfrac (or: textstylefrac) instead of frac in the first argument of underbrace. (By default, the first argument of underbrace is processed in display-style math mode. However, the remainder of the denominator is processed in text style, not display style.)

Omit all cdot directives. They achieve little but clutter up the appearance of the equation.

For better horizontal spacing as well as for more typographically-appropriate sizing of the parentheses in the final part of the equation, use Bigl( and Bigr) instead of left( and right).

enter image description here

documentclassarticle
usepackageamsmath % for "tfrac" macro
begindocument
[
frac1v_G 
= frac1v_ph 
frac1 - fraclambdan fracpartial npartial lambda%
 1 - bigl(fraclambdan bigr)^!2 !
underbracetfracpartial^2 npartiallambda^2_=0
= frac1v_ph Bigl( 1 - fraclambdan 
 fracpartial npartial lambda Bigr)
]
enddocument

answered 3 mins ago

Mico

267k30362747

Some suggestions (the first two of which have already been made by @egreg):

Omit the large parentheses entirely. They seem to satisfy no useful purpose.

Use tfrac (or: textstylefrac) instead of frac in the first argument of underbrace. (By default, the first argument of underbrace is processed in display-style math mode. However, the remainder of the denominator is processed in text style, not display style.)

Omit all cdot directives. They achieve little but clutter up the appearance of the equation.

For better horizontal spacing as well as for more typographically-appropriate sizing of the parentheses in the final part of the equation, use Bigl( and Bigr) instead of left( and right).

enter image description here

documentclassarticle
usepackageamsmath % for "tfrac" macro
begindocument
[
frac1v_G 
= frac1v_ph 
frac1 - fraclambdan fracpartial npartial lambda%
 1 - bigl(fraclambdan bigr)^!2 !
underbracetfracpartial^2 npartiallambda^2_=0
= frac1v_ph Bigl( 1 - fraclambdan 
 fracpartial npartial lambda Bigr)
]
enddocument

answered 3 mins ago

Mico

267k30362747

answered 3 mins ago

Mico

267k30362747

answered 3 mins ago

Mico

267k30362747

answered 3 mins ago

Mico

267k30362747

add a commentÂ |Â

astronerd is a new contributor. Be nice, and check out our Code of Conduct.

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