bumped archive version because of new way of specifying symmetry for indexed

[ginac.git] / NEWS

diff --git a/NEWS b/NEWS
index af84e795c70f2dd6ca4cd823b1db387a908d346c..e62d07386a8be0560beea6c81509f523ed1c6268 100644 (file)
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@@ -1,6 +1,29 @@
 This file records noteworthy changes.
 
-0.9.0 (<date>)
+0.9.1 (<date>)
+* New functions/methods:
+   - remove_first() and remove_last() for lists
+   - symmetrize_cyclic()
+* Instead of just totally symmetric or antisymmetric, complex symmetries
+  can now be defined for indexed objects. Symmetries are described by a
+  tree of "symmetry" objects that is constructed with the sy_none(),
+  sy_symm(), sy_anti() and sy_cycl() functions. The symmetry of a function
+  with respect to its arguments can also be defined (this is currently
+  only used for the Beta function).
+* color_trace() and dirac_trace() can be applied to a more general class
+  of expressions, e.g. using it on a relation will take the trace on both
+  sides etc.
+* Generalized map() to take a function object instead of a function pointer.
+  This allows passing an arbitrary number of additional state to the
+  function being called.
+* Supplement some (now deprecated) macros by inlined template functions:
+  - is_of_type(foo, type) -> is_a<type>(foo)
+  - is_ex_of_type(foo, type) -> is_a<type>(foo)
+  - is_exaclty_of_type(foo, type) -> is_exaclty_a<type>(foo)
+  - is_ex_exaclty_of_type(foo, type) -> is_exaclty_a<type>(foo)
+  - ex_to_foobar(baz)  ->  ex_to<foobar>(baz)
+
+0.9.0 (7 June 2001)
 * In the output and in ginsh, lists are now delimited by { } braces, and
   matrices are delimited by single [ ] brackets.
 * simplify_indexed() renames dummy indices so, e.g., "a.i*a.i+a.j*a.j" gets