Pythagorean quadruples: Difference between revisions

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@@ Line 1,906: / Line 1,906: @@
 =={{header|Sidef}}==
+<lang ruby># Finds all solutions (a,b) such that: a^2 + b^2 = n^2
-<lang ruby>require('ntheory')
-# Finds all solutions (a,b) such that: a^2 + b^2 = n^2
 func sum_of_two_squares(n) is cached {
@@ Line 1,947: / Line 1,945: @@
             for p,e in (prime_powers) {
                 var pp = p**e
-                var r = %S<ntheory>.sqrtmod("#{pp - 1}", "#{pp}")
+                var r = sqrtmod(-1, pp)
                 take([[r, pp], [pp - r, pp]])
             }