Changeset ebd2ba6 in sasmodels

Timestamp:

Nov 1, 2017 12:32:31 PM (7 years ago)

Author:

Paul Kienzle <pkienzle@…>

Branches:

master, core_shell_microgels, magnetic_model, ticket-1257-vesicle-product, ticket_1156, ticket_1265_superball, ticket_822_more_unit_tests

Children:

de71632

Parents:

05e4f8a

Message:

save before commit next time

File:

• explore/guyou.py (modified) (1 diff)

explore/guyou.py

@@ -280 +280 @@
   } while (--i);
 
-  // Note: cephes uses dn = sqrt(1 - m*sin^2 phi) rather than cos(phi)/cos(phi-b)
-  // This agrees with matlab docs: dn = sqrt(1 - m sin^2 phi)
+  // [PAK] Cephes uses dn = sqrt(1 - m*sin^2 phi) rather than cos(phi)/cos(phi-b)
+  // DLMF says the second version is unstable near x = K.
   return [sin(phi), t = cos(phi), t / cos(phi - b), phi];
 }