char-ci<=?[procedure] char-ci=? char1 char2 char3 ...
[procedure] char-ci<=? char1 char2 char3 ...
[procedure] char-ci<? char1 char2 char3 ...
[procedure] char-ci>=? char1 char2 char3 ...
[procedure] char-ci>? char1 char2 char3 ...
R6RS, MzScheme
Compares characters by case-folding them first (see char-foldcase).
See the notes in char-upcase.
[procedure] char-ci=? char1 char2
[procedure] char-ci<=? char1 char2
[procedure] char-ci<? char1 char2
[procedure] char-ci>=? char1 char2
[procedure] char-ci>? char1 char2
R5RS
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