OK. Thank you for your hint. ${\cal F}_t$ is what I need.
2008/10/7 Aditya Mahajan
On Sun, 5 Oct 2008, Zhaopeng Xing wrote:
Hi,
I found a strange problem with the latest beta on my linux box. $\cal{F}_t$ produces no subscript as in the attachment.
There are no lowercase caligraphic letters. Did you mean ${\cal F}_t$ or $\cal F_T$?
Aditya
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