- GiNaC-cint: Change to new (still experimental) scheme for handling 2-arg

[ginac.git] / NEWS

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 This file records noteworthy changes.
 
+0.7.1 ()
+* Fix problems with Cint that were caused by CLN's overloaded operator new.
+
+0.7.0 (15 December 2000)
+* Requires CLN 1.1 now.  Class numeric doesn't use an indirect pointer to the
+  actual representation any more.  This is a speedup.
+* mul::expand() was reengineered to not allocate temporary excess memory.
+* Non-integer powers of a symbol are treated as constants by (l)degree() and
+  coeff().  Using these functions on an expression containing such powers used
+  to fail with an internal error message.  The side-effect is that collect()
+  can be used on expressions which are not polynomials.
+* Added a man page for the ginac-config script.
+* Ctor of numeric from char* honors Digits.
+
+0.6.4 (10 August 2000)
+* Complete revamp of methods in class matrix.  Some redundant (and poor)
+  implementations of elimination schemes were thrown out.  The code is now
+  highly orthogonal, more flexible and much more efficient.
+* Some long standing and quite nasty bugs were discovered and fixed in the
+  following functions: add::normal(), heur_gcd(), sr_gcd() and Order_eval().
+
+0.6.3 (25 July 2000)
+* Derivatives are now assembled in a slightly different manner (i.e. they
+  might 'look' different on first sight).  Under certain circumstances this
+  can result in a dramatic speedup because it gives hashing a better chance,
+  especially when computing higher derivatives.
+* Some series expansions of built-in functions have been reengineered.
+* The algorithm for computing determinants can be chosen by the user.  See
+  ginac/flags.h and ginac/matrix.h.
+* The Dilogarithm (Li2) now has floating point evaluation, derivative and a
+  proper series expansion.
+* Namespace 'std' cleanly disentangled, as demanded by ISO/EIC 14882-1998(E).
+* Some minor bugfixes, one major lsolve()-bugfix and documentation updates.
+
 0.6.2 (21 June 2000)
 * ginaccint.bin is now launched by a binary program instead of by a scripts.
   This allows us to write #!-scripts.  A small test suite for GiNaC-cint was