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diff PROJECTS @ 3713:0c7f2dda1d1a

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[project @ 2000-08-23 05:17:48 by jwe]
author jwe
date Wed, 23 Aug 2000 05:17:48 +0000
parents 996bb7ea4507
children a816be1d1626
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--- a/PROJECTS
+++ b/PROJECTS
@@ -23,7 +23,11 @@
 
   * Improve logm, and sqrtm.
 
-  * Improve complex mapper functions.
+  * Improve complex mapper functions.  See W. Kahan, ``Branch Cuts for
+    Complex Elementary Functions, or Much Ado About Nothing's Sign
+    Bit'' (in The State of the Art in Numerical Analysis, eds. Iserles
+    and Powell, Clarendon Press, Oxford, 1987) for explicit
+    trigonometric formulae.
 
   * Make functions like gamma() return the right IEEE Inf or NaN
     values for extreme args or other undefined cases.