nb 1 kb 1

A formula from the LATEX Companion, 2nd Edition, p.390:
!
n
X
n−1
(1 − t)n−k t k −1uk .
t[u 1 , . . . , un ] =
k−1
k=1
The ISO would prefer that a formula like
Z u
2
1
e −t /2 dt
Φ(u) = √
2π −∞
be typeset instead as
Z u
2
1
Φ(u) = √
e −t /2 dt ,
2π −∞
with upright π, e and d. I dislike the look of dt when the slope of t is too
great.