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Diffstat (limited to 'algebraic-structures.group.number.sum.scm')
| -rw-r--r-- | algebraic-structures.group.number.sum.scm | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/algebraic-structures.group.number.sum.scm b/algebraic-structures.group.number.sum.scm new file mode 100644 index 0000000..2bb7331 --- /dev/null +++ b/algebraic-structures.group.number.sum.scm @@ -0,0 +1,8 @@ +(import (only (algebraic-structures group make))) +(module (algebraic-structures group number sum) = (algebraic-structures group make) + (import scheme + (chicken module) + (algebraic-structures monoid number sum)) + (export <> unit inv) + + (define (inv x) (- x))) |