X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?a=blobdiff_plain;f=NEWS;h=9122ea08f7bc90591f35ec1d84acbc0f4b96db95;hb=7159dc04b88c350af7e023a69d056ad00c25a8e9;hp=3178447cdcc2c110363bd6e21be98be7293b9f10;hpb=9277bfc1c85e61162568732f416780e3fda4894c;p=ginac.git

diff --git a/NEWS b/NEWS
index 3178447c..9122ea08 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,55 @@
 This file records noteworthy changes.
 
+1.0.12 (<date>)
+* Fixed a bug in power::expand() that could produce invalid exressions.
+* The input parser no longer ignores extra data following accepted input.
+
+1.0.11 (18 September 2002)
+* Fixed a possible memory corruption in contractions of indexed objects with
+  delta or metric tensors.
+* Computing the derivative of a power series object with respect to a symbol
+  that is not the expansion variable now works correctly.
+* Several bugfixes in code generation.
+
+1.0.10 (24 July 2002)
+* Powers of indexed objects are now parenthesized correctly in LaTeX output.
+* Input parser handles indices (they have to be specified in the same list
+  as the symbols).
+* Added some limited support for subspaces in the idx and tensor classes.
+* Fixed a bug in canonicalize() (antisymmetric canonicalization of an already
+  sorted list containing two or more equal objects failed to return 0).
+
+1.0.9 (11 June 2002)
+* simplify_indexed() now raises/lowers dummy indices to canonicalize the index
+  variance. This allows some simplifications that weren't possible before,
+  like eps~a.b~c~d*X.a*X~b -> 0 and X.a~a-X~a.a -> 0.
+* Implemented relational::subs().
+* Fixed bug in simplify_ncmul() for clifford objects.
+
+1.0.8 (31 March 2002)
+* Improvements in memory usage of the expand() methods.
+
+1.0.7 (18 March 2002)
+* Fixed LaTeX output of indexed and matrix objects.
+* Fixed matrix::pow(n) for n==0 and added helper functions to create unit
+  matrices "ex unit_matrix(unsigned, unsigned)".
+
+1.0.6 (4 March 2002)
+* "(x+1).subs(x==x-1)" now returns the correct result "x" instead of "x-1".
+
+1.0.5 (27 January 2002)
+* (l)degree(s), coeff(s, n) and collect(s) were extended to accept expressions
+  of any class (except add/mul/ncmul/numeric) for "s". They should even work
+  if "s" is a "power" object, as long as the exponent is non-integer, but with
+  some limitations. For example, you can "collect(a*2^x+b*2^x, 2^x)" to get
+  "(a+b)*2^x", but "degree(2^(3*x), 2^x)" yields 0 instead of 3).
+* Fixed a small output bug.
+
+1.0.4 (24 January 2002)
+* Speedup in expand().
+* Faster Bernoulli numbers (Markus Nullmeier).
+* Some minor bugfixes and documentation updates.
+
 1.0.3 (21 December 2001)
 * Fixed a bug where quo() would call vector::reserve() with a negative
   argument.