~fenics-core/ufl/spatder2grad

1.1.x [2012-??-??]

 - Support adding 0 to forms, allowing sum([a])

 - Major memory savings and optimizations.

 - Some bugfixes.

 - Add perp operator.

 - Support nested tuple syntax like MixedElement((U,V),W)

 - Allow outer(a, b, c, ...) by recursive application from left.

 - Add simplification f/f -> 1

 - Add operators <,>,<=,>= in place of lt,gt,le,ge

1.0.0 [2011-12-07]

 - No changes since rc1.

1.0-rc1 [2011-11-22]

 - Added tests covering snippets from UFL chapter in FEniCS book

 - Added more unit tests

 - Added operators diag and diag_vector

 - Added geometric quantities cell.surface_area and cell.facet_area

 - Fixed rtruediv bug

 - Fixed bug with derivatives of elements of type Real with unspecified cell

1.0-beta3 [2011-10-26]

 - Added nabla_grad and nabla_div operators

 - Added error function erf(x)

 - Added bessel functions of first and second kind, normal and modified,

   bessel_J(nu, x), bessel_Y(nu, x), bessel_I(nu, x), bessel_K(nu, x)

 - Extended derivative() to allow indexed coefficient(s) as differentiation variable

 - Made *Constant use the 'Real' space instead of 'DG0'

 - Bugfix in adjoint where test and trial functions were in different spaces

 - Bugfix in replace where the argument to a grad was replaced with 0

 - Bugfix in reconstruction of tensor elements

 - Some other minor bugfixes

1.0-beta2 [2011-08-11]

 - Support c*form where c depends on a coefficient in a Real space

1.0-beta [2011-07-08]

 - Add script ufl-version

 - Added syntax for associating an arbitrary domain data object with a measure:

	dss = ds[boundaries]; M = f*dss(1) + g*dss(2)

 - Added new operators elem_mult, elem_div, elem_pow and elem_op for

   elementwise application of scalar operators to tensors of equal shape

 - Added condition operators And(lhs,rhs) and Or(lhs,rhs) and Not(cond)

 - Fixed support for symmetries in subelements of a mixed element

 - Add support for specifying derivatives of coefficients to derivative()

0.9.1 [2011-05-16]

 - Remove set_foo functions in finite element classes

 - Change license from GPL v3 or later to LGPL v3 or later

 - Change behavior of preprocess(), form.compute_form_data(), form_data.preprocessed_form

 - Allowing grad, div, inner, dot, det, inverse on scalars

 - Simplify Identity(1) -> IntValue(1) automatically

 - Added Levi-Cevita symbol: e = PermutationSymbol(3); e[i,j,k]

 - Fix bug with future division behaviour (ufl does not support floor division)

 - Add subdomain member variables to form class

 - Allow action on forms of arbitrary rank

0.9.0 [2011-02-23]

 - Allow jump(Sigma, n) for matrix-valued expression Sigma

 - Bug fix in scalar curl operator

 - Bug fix in deviatoric operator

0.5.4 [2010-09-01]

 - Bug fixes in PartExtracter

 - Do not import x for coordinate

 - Add Circumradius to Cell (Cell.circumradius)

 - Add CellVolume to Cell (Cell.volume)

0.5.3 [2010-07-01]

 - Rename ElementRestriction --> RestrictedElement

 - Experimental import of x from tetrahedron

 - Make lhs/rhs work for resrictions

 - Redefine operator + for FiniteElements and replace + by *

 - Rename ElementUnion -> EnrichedElement

 - Add support for tan() and inverse trigonometric functions

0.5.2 [2010-02-15]

 - Attach form data to preprocessed form, accessible by form.form_data()

0.5.1 [2010-02-03]

 - Fix bug in propagate_restriction

0.5.0 [2010-02-01]

 - Several interface changes in FormData class

 - Introduce call preprocess(form) to be called at beginning of compilation

 - Rename BasisFunction --> Argument

 - Rename Function --> Coefficient

0.4.1 [2009-12-04]

 - Redefine grad().T --> grad()

 - New meaning of estimate_max_polynomial_degree

 - New function estimate_total_polynomial_degree

 - Allow degree = None and cell = None for elements

0.4.0 [2009-09-23]

 - Extensions for ElementRestriction (restrict FiniteElement to Cell)

 - Bug fix for lhs/rhs with list tensor types

 - Add new log function set_prefix

 - Add new log function log(level, message)

 - Added macro cell integral *dE

 - Added mechanism to add additional integral types

 - Added LiftingOperator and LiftingFunction

 - Added ElementRestriction

0.3.0 [2009-05-28]

 - Some critical bugfixes, in particular in differentiation.

 - Added form operators "system" and "sensitivity_rhs".

 - diff can take form as argument, applies to all integrands.

 - Rudimentary precedence handling for better

   use of parentheses in str(expression).

 - Added script ufl2py, mainly for debugging purposes.

 - Crude implementation of estimate_max_polynomial_degree

   for quadrature degree estimation.

 - Improved manual.

0.2.0 [2009-04-07]

 - Initial release of UFL.

0.1.0 [...]

 - Unreleased development versions of UFL.