This file records noteworthy changes.
-0.9.4 (<insert date here>)
+1.2.0 (<insert date>)
+* Added a structure<T> template class for the easy creation of user-defined
+ algebraic classes.
+* Many internal reorganizations and optimizations.
+* Caveats for class implementors:
+ - basic::copy() and basic::destroy() are gone; classes derived from
+ basic can use the defaults for the assignment operator and copy
+ constructor.
+ - basic::subs() now descends into subexpressions (if accessible via
+ nops()/op()/let_op()). If you have a custom implementation of subs()
+ that calls basic::subs() after substituting subexpressions, this needs
+ to be changed to a call to subs_one_level().
+
+1.1.0 (3 April 2003)
+* Removed deprecated macros is_ex_a, is_ex_exactly_a and friends for good.
+* The scalar_products mechanism allows the specification of an index dimension.
+* Removed dirac_gamma6/7().
+* Added ex::to_polynomial().
+* subs() accepts an optional "options" argument. The option
+ subs_option::subs_algebraic enables "smart" substitutions in products and
+ powers.
+* Added stream manipulators "dflt", "latex", "python", "python_repr", "tree",
+ "csrc", "csrc_float", "csrc_double", "csrc_cl_N", "index_dimensions" and
+ "no_index_dimensions" to control the output format. Calling basic::print()
+ directly is now deprecated.
+* Made the hashing more simple and efficient.
+* Caveats for class implementors:
+ - basic::subs(): third argument changed from "bool" to "unsigned"
+ - unarchiving constructor and basic::unarchive(): "const" removed from
+ second argument
+ - basic::let_op() should only be implemented if write access to
+ subexpressions is desired
+ - simplify_ncmul() renamed to eval_ncmul()
+ - simplified_ncmul() renamed to hold_ncmul()
+ - nonsimplified_ncmul() renamed to reeval_ncmul()
+
+1.0.14 (1 March 2003)
+* Improved the C-source output: complex numbers are printed correctly (using
+ the STL complex<> template or cln::complex()), rational numbers use cl_RA()
+ in the CLN output, and small integers are printed in a more compact format
+ (e.g. "2.0" instead of "2.0000000e+00").
+* function_options::set_return_type() and function_options::do_not_evalf_params()
+ now actually work.
+
+1.0.13 (27 January 2003)
+* Contracting epsilon tensors with Euclidean indices now works.
+* Improved dummy index symmetrization in sums.
+* Added dirac_gammaL/R(), which can be used instead of dirac_gamma6/7()
+ but are single objects, to allow for a more compact notation of Dirac
+ strings.
+* Powers with negative numeric exponents are printed as fractions in the
+ LaTeX output.
+* Added symbolic_matrix() for the convenient creation of matrices filled
+ with symbols.
+* Added collect_common_factors() which collects common factors from the
+ terms of sums.
+* simplify_indexed() converts "gamma~mu*p.mu" to "p\".
+
+1.0.12 (30 October 2002)
+* Fixed a bug in power::expand() that could produce invalid expressions.
+* The input parser no longer ignores extra data following accepted input.
+* Improved the CLN C-source output (integers are printed as integers, and
+ floating point numbers include the precision).
+* Fixed a problem in the LaTeX-output of negative fractions.
+* Added print_latex() and print_csrc() to ginsh.
+* The sprem() function is now public.
+
+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.
+* Fix several bugs in code generation.
+
+1.0.2 (19 December 2001)
+* Input parser recognizes "sqrt()", which is also used in the output.
+* divide(a,b,q) only modifies q if the division succeeds; also, divide(a,b,a)
+ works now.
+* Fixed small bug in dummy index renaming which could cause it to not
+ recognize renamable indices in some cases.
+* power::degree() and power::ldegree() throw an exception when encountering
+ a non-integer exponent.
+* Add output-support for Python bindings.
+
+1.0.1 (22 November 2001)
+* Function sqrfree() handles a few more cases now.
+* Class relational has real canonical ordering now.
+* Handle obscene libreadline version numbers when building ginsh.
+
+1.0.0 (6 November 2001)
+* Some internal reorganization resulting in a general speed-up.
+* The last 3 evaluated expressions in ginsh are now referred to with the
+ tokens '%', '%%' and '%%%'. The old '"', '""' and '"""' remain for
+ compatibility but may be removed in a future version of GiNaC.
+
+0.9.4 (20 September 2001)
* Functions have better support for external scripting languages.
* Interface cleanups and bugfixes.
+* Fix silly bug in evalf() that prevented things like 2^Pi being computed.
0.9.3 (16 August 2001)
* series expansion now much more consistent for small order expansion.
git://www.ginac.de / ginac.git / blobdiff