This probably should have been directed at SRFI 144, but that has been
finalized.

These constants are the same:

;;; C99 M_LOG10E
(define fl-log10-e
0.43429448190325182765112891891660508229439700580367###)
(define fl-1/log-10
0.43429448190325182765112891891660508229439700580367###)

as are these

;;; C99 M_LOG2E
(define fl-log2-e
1.44269504088896340735992468100189213742664595415299###)
(define fl-1/log-2
1.44269504088896340735992468100189213742664595415299###)

Perhaps in SRFI 276 we should keep only one of each pair, the one with a
C99 definition.

I'm not really into special functions, but I will say that I can't think
of a use for lots of these constants (e^euler?).

Brad