General ⇒ Write stuff in levels under each other

[xetal]

Say that I have two conditions P_1 and P_2. Then I want P_1 to be precisely under sup and P_2 to be precisely under P_1. I.e.,

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sup (something)
P_1
P_2

How do I do this? Example:

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\displaystyle \sup_{{P_1}_{P_2}}

P_1 is in the example exactly under sup, but P_2 is not exactly under P_1

[Stefan Kottwitz]

Hi xetal,

try \shortstack:

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\displaystyle \sup_{\shortstack{$P_1$\\$P_2$}}

Stefan

[balf]

With AMSmath:
\displaystyle \sup_{\substack{P_1\\P_2}}

B.A.

[xetal]

Thank you Stefan and balf!