Am Thu, 1 Oct 2020 22:47:31 -0500 schrieb Don Hosek:
> While looking into this question https://tex.stackexchange.com/questions/565031/slightly-bigger-integral-in-exponent <https://tex.stackexchange.com/questions/565031/slightly-bigger-integral-in-exponent> I found that the formatting of \int differs slightly when using the amsmath package vs the base LaTeX with the former using a scriptstyle integral while the base uses a textstyle integral.
> So the questions are: (1) what¢s happening differently in amsmath
> to change the appearance of the integral
amsmath use a different cmex font:
cmextra/cmex7.pfb instead of cmex10.pfb because of this code part
you can get the "classical" appearance with
> and (b) which is the correct behavior?
Well like always, it is a matter of taste, but I would say they made
the change because they think it looks better like this and I agree.