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NEWS

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    NEWS 3.43 KiB
    2009-26-3
    	ALBERTA 3.0-rc1
    
    	- per default ALBERTA installs itself into the directory
              hierarchy below "/usr/local/". Previous versions of ALBERTA
              installed themselves into the build-directory.
    
    	- separate graphics and "core" ALBERTA libraries, and a
              global configure-time graphics kill-switch
              "--disable-graphics".
    
    	- BLAS is not used by default, but can optionally be enable by
              running configure with the "--enable-fortran-blas" switch.
    
            - easy-to-use (iso-)parametric meshes, up to piecewise polynomial
              degree of 4. The coordinate vectors are now dumped to disk
              along with the mesh-structure when calling write_mesh().
    
            - parametric meshes for arbitrary co-dimension for 1d/2d/3d meshes
              (computations on embedded 3-manifolds are now possible, e.g.)
    
            - periodic meshes; with non-periodic and periodic finite element
              spaces on the same mesh, definition via geometric or
              combinatorial face transformations.
    
            - support for non-oriented meshes; affects mainly 2d (think,
              e.g., of a Klein's bottle or a Moebius-strip).
    
            - sub-mesh hierarchies, with proper mapping of
              trace-spaces. Sub-meshes inherit the parametric and/or
              periodic structures of their master-meshes. Sub-meshes 
    
            - _optional_ per-element intializers for basis functions and
              quadratures, for extensions which require more complicated stuff
              than is provided by ALBERTA.
    
            - fast (i.e. caching) quadratures for faces.
    
            - marginally improved quadrature rules for 3d.
    
    	- discontinuous orthogonal basis functions up to degree 2.
    
            - extended demo-program suite, with example programs for parametric
              meshes (iso-parametric, but also higher co-dimension),
              non-orientable surfaces, stationary Quasi-Stokes with stress
              boundary conditions, periodic meshes.
    
            - improved GRAPE interface, interfaces to GMV, Silo, Geomview,
              Paraview (with varying degree of completeness and
              usability).
    
    2007-10-XX
    	ALBERTA 2.0
    	- support of submeshes, DIM constant removed
    	
    	- support of iso-parametric meshes up to p.w. polynomial degree 2
    
    	- more generalized node projection mechanism
    
    	- graphics output interface to GMV
    
    	- discontinuous basis functions up to degree 2.
    
    	- get_fe_space() works at any time
    
    	- INDEX macro only available for ALBERTA_DEBUG=1
    
    	- NEIGH_IN_EL, EL_INDEX macros removed
    
    	- former SOLVER package incorporated into "alberta_util",
    	  "PLOT_ANSI" package removed
    
    	- ALBERTA_DEBUG=1 introduces additional safety checks
    
    	- changed "preserve_coarse_dofs" mechanism
    
    	- changed "fe_space" entry in DOF_[DOWB_]MATRIX into a
    	  "row_fe_space" and a "col_fe_space". Fixed issue with
    	  dof_compress() and different fe_spaces.
    
    	- added a "DOF_PTR_VEC" type.
    
    2004-12-07
    	ALBERTA 1.2.1
    	
    	Bug fixes.
    
    2004-07-30
    	ALBERTA 1.2
    
    	Renamed from ALBERT to ALBERTA (copyright issues)
    
    	New features:
    	- mixed methods
    	- GRAPE interface
    
    	Configuration
    	- configure options are more consistent
    	- it is possible to build only selected libraries
    	- default CFLAGS are now -O3 (gcc) or -O (non-gcc), can be
    	  overridden by environment variables or on the command line
    	- it is possible to specify an alternate blas-library
    
    	Removed:
    	- distributed BLAS library
    
    	Support:
    	- ALBERTA now has a mailing list at
    
    	http://www.mathematik.uni-freiburg.de/IAM/ALBERTA/mailinglist.html