MHB Fixing Subscripts of Subscripts in Joseph Rotman's Advanced Modern Algebra Proof

[Math Amateur]

I recently posted a question regarding Joseph Rotman's text Advanced Modern Algebra - Theorem 2.68 and its proof, which reads as follows:View attachment 2699

When I typed the line:

$$ \pi (a) = {u_i}_1^{e_1} ... \ ... {u_i}_k^{e_k}$$

I found that the subscript 1 of the subscript i was too large as was, it seems, the subscript k of the subscript i

Can someone help with getting the subscripts of subscripts the right size?

Help would be appreciated.

Peter

 

[Prove It]

I recently posted a question regarding Joseph Rotman's text Advanced Modern Algebra - Theorem 2.68 and its proof, which reads as follows:View attachment 2699

When I typed the line:

$$ \pi (a) = {u_i}_1^{e_1} ... \ ... {u_i}_k^{e_k}$$

I found that the subscript 1 of the subscript i was too large as was, it seems, the subscript k of the subscript i

Can someone help with getting the subscripts of subscripts the right size?

Help would be appreciated.

Peter

So just so that I understand, you want u with a subscript of i1, where the 1 is also subscript?

Try u_{i_1} to get $\displaystyle \begin{align*} u_{i_1} \end{align*}$.

 

[Math Amateur]

So just so that I understand, you want u with a subscript of i1, where the 1 is also subscript?

Try u_{i_1} to get $\displaystyle \begin{align*} u_{i_1} \end{align*}$.

I wanted U to have a subscript of i which itself has a subscript of 1 ... ...

and your suggestion of \begin{align*} u_{i_1} \end{align*} seems to produce the required result ...What do the "begin{align*}" and the "end{align*}" do?

Thanks for the help, by the way!

Peter

 

[Prove It]

I wanted U to have a subscript of i which itself has a subscript of 1 ... ...

and your suggestion of \begin{align*} u_{i_1} \end{align*} seems to produce the required result ...What do the "begin{align*}" and the "end{align*}" do?

Thanks for the help, by the way!

Peter

If you have to go through a lot of steps it enables you to align the equals signs. Put &= instead of =. It also works with most other symbols you want aligned. The * stops each line being listed with a number.

As for why I included it, it's just easier to have it copied so that when I paste I don't have to write it again, as most of my posts do have numerous steps. It wasn't necessary for this one though.

 

[Dustinsfl]

Not to be mean but you seem to ask a lot of trivial questions on LaTeX. You should read the Not to Short Intro to LaTeX or get a manual on LaTeX. For the latter, just Google Not to...to LaTeX.

 

[MarkFL]

Not to be mean but you seem to ask a lot of trivial questions on LaTeX. You should read the Not to Short Intro to LaTeX or get a manual on LaTeX. For the latter, just Google Not to...to LaTeX.

Dustin, this forum is here so that folks can ask questions regarding the use of $\LaTeX$, even if they may be considered to be "trivial" to someone else. When one person has a question, chances are that others will face this same issue, and having this thread here with a solution posted will quickly answer this question for anyone who finds this thread via a search.

We encourage folks to post their questions, as this is how our knowledge base is increased. :D

 

[Dustinsfl]

Dustin, this forum is here so that folks can ask questions regarding the use of $\LaTeX$, even if they may be considered to be "trivial" to someone else. When one person has a question, chances are that others will face this same issue, and having this thread here with a solution posted will quickly answer this question for anyone who finds this thread via a search.

We encourage folks to post their questions, as this is how our knowledge base is increased. :D

the answers to these basic questions already exist and are available for free. Check out the Not so Short Intro to LaTeX and you will see. It was produced by one of the TUG people to alleviate these basic questions. They didn't produce this for no reason. We don't need to reinvent the wheel.

 

[MarkFL]

the answers to these basic questions already exist and are available for free. Check out the Not so Short Intro to LaTeX and you will see. It was produced by one of the TUG people to alleviate these basic questions. They didn't produce this for no reason. We don't need to reinvent the wheel.

Well, the same could be said of most of the math questions posted here as well, but if we begin to send people to other sites to get their questions answered simply because an answer has already been posted elsewhere, then we aren't really providing any kind of service, other than to increase traffic on other sites.

It is much more useful and convenient to our members to have their questions answered here, rather than to be directed to a mass of documentation where they are then required to dig out what they want. We want our users to feel that they can come here to ask questions, and get a direct answer, rather than being directed elsewhere.

I don't see it as reinventing the wheel, but rather providing help here, when and where it is needed for our users. :D

 

[Dustinsfl]

Well, the same could be said of most of the math questions posted here as well, but if we begin to send people to other sites to get their questions answered simply because an answer has already been posted elsewhere, then we aren't really providing any kind of service, other than to increase traffic on other sites.

It is much more useful and convenient to our members to have their questions answered here, rather than to be directed to a mass of documentation where they are then required to dig out what they want. We want our users to feel that they can come here to ask questions, and get a direct answer, rather than being directed elsewhere.

I don't see it as reinventing the wheel, but rather providing help here, when and where it is needed for our users. :D

It is a PDF that one can download, read, and reference. It isn't a site to answer questions. It is a reference manual.

 

[Nono713]

I think you both have valid points.
My post is however fairly useless, but I guess it's too late now

 

[Math Amateur]

Not to be mean but you seem to ask a lot of trivial questions on LaTeX. You should read the Not to Short Intro to LaTeX or get a manual on LaTeX. For the latter, just Google Not to...to LaTeX.

Thanks dwsmith, I will follow your instruction, but I hope it is still acceptable for MHB members to ask questions when one is at a genuine loss as to how to produce a mathematical symbol or expression via Latex, even if it appears trivial to more masterful users.

Peter