ref: b638c7753d8498eaec90f06a7c140ffe0ed76cdb
dir: /sys/src/cmd/postscript/tests/troff1/
.EQ
delim $$
.EN
.TS
doublebox;
c c
l l.
Name Definition
.sp
.vs +2p
Gamma $GAMMA (z) = int sub 0 sup inf t sup {z-1} e sup -t dt$
Sine $sin (x) = 1 over 2i ( e sup ix - e sup -ix )$
Error $ roman erf (z) = 2 over sqrt pi int sub 0 sup z e sup {-t sup 2} dt$
Bessel $ J sub 0 (z) = 1 over pi int sub 0 sup pi cos ( z sin theta ) d theta $
Zeta $ zeta (s) = sum from k=1 to inf k sup -s ~~( Re~s > 1)$
.vs -2p
.sp 2
.TE