NEWS
changeset 30855 c22436e6d350
parent 30849 0e5ec6d2c1d9
child 30904 cc6a6047a10f
child 30930 11010e5f18f0
equal deleted inserted replaced
30854:740517878d60 30855:c22436e6d350
   611 one_not_zero ~> carrier_one_not_zero  (collision with assumption)
   611 one_not_zero ~> carrier_one_not_zero  (collision with assumption)
   612 
   612 
   613 
   613 
   614 *** HOL-Nominal ***
   614 *** HOL-Nominal ***
   615 
   615 
   616 * Modernized versions of commands 'nominal_inductive',
   616 * Nominal datatypes can now contain type-variables.
   617 'nominal_primrec', and 'equivariance' work with local theory targets.
   617 
       
   618 * Commands 'nominal_inductive' and 'equivariance' work with local
       
   619 theory targets.
       
   620 
       
   621 * Nominal primrec can now works with local theory targets and its
       
   622 specification syntax now conforms to the general format as seen in
       
   623 'inductive' etc.
       
   624 
       
   625 * Method "perm_simp" honours the standard simplifier attributes
       
   626 (no_asm), (no_asm_use) etc.
       
   627 
       
   628 * The new predicate #* is defined like freshness, except that on the
       
   629 left hand side can be a set or list of atoms.
       
   630 
       
   631 * Experimental command 'nominal_inductive2' derives strong induction
       
   632 principles for inductive definitions.  In contrast to
       
   633 'nominal_inductive', which can only deal with a fixed number of
       
   634 binders, it can deal with arbitrary expressions standing for sets of
       
   635 atoms to be avoided.  The only inductive definition we have at the
       
   636 moment that needs this generalisation is the typing rule for Lets in
       
   637 the algorithm W:
       
   638 
       
   639  Gamma |- t1 : T1   (x,close Gamma T1)::Gamma |- t2 : T2   x#Gamma
       
   640  -----------------------------------------------------------------
       
   641          Gamma |- Let x be t1 in t2 : T2
       
   642 
       
   643 In this rule one wants to avoid all the binders that are introduced by
       
   644 "close Gamma T1".  We are looking for other examples where this
       
   645 feature might be useful.  Please let us know.
   618 
   646 
   619 
   647 
   620 *** HOLCF ***
   648 *** HOLCF ***
   621 
   649 
   622 * Reimplemented the simplification procedure for proving continuity
   650 * Reimplemented the simplification procedure for proving continuity
   628 some rare cases the new simproc may fail to solve subgoals that the
   656 some rare cases the new simproc may fail to solve subgoals that the
   629 old one could solve, and "simp add: cont2cont_LAM" may be necessary.
   657 old one could solve, and "simp add: cont2cont_LAM" may be necessary.
   630 Potential INCOMPATIBILITY.
   658 Potential INCOMPATIBILITY.
   631 
   659 
   632 * Command 'fixrec': specification syntax now conforms to the general
   660 * Command 'fixrec': specification syntax now conforms to the general
   633 format as seen in 'inductive', 'primrec', 'function', etc.  See
   661 format as seen in 'inductive' etc.  See src/HOLCF/ex/Fixrec_ex.thy for
   634 src/HOLCF/ex/Fixrec_ex.thy for examples.  INCOMPATIBILITY.
   662 examples.  INCOMPATIBILITY.
   635 
   663 
   636 
   664 
   637 *** ZF ***
   665 *** ZF ***
   638 
   666 
   639 * Proof of Zorn's Lemma for partial orders.
   667 * Proof of Zorn's Lemma for partial orders.