Re: [isabelle-dev] proposal for new numeral representation

2011-12-05 Thread Tobias Nipkow
Am 25/11/2011 16:56, schrieb Makarius: Broken proof methods sos_cert some uses in Library/Sum_of_Squares.thy BTW the regular sos method with the server communication is broken for some months already. It would be nice if someone could volunteer to recover this nice student project

Re: [isabelle-dev] proposal for new numeral representation

2011-11-25 Thread Makarius
On Thu, 24 Nov 2011, Brian Huffman wrote: I have been working on a new numeral representation for Isabelle recently, and I would like to share it with everyone. An overview of the design is now available on the Isanotes wiki [1]; a patched version of the Isabelle hg repo is also available

Re: [isabelle-dev] proposal for new numeral representation

2011-11-25 Thread Florian Haftmann
Hi Brian, I have been working on a new numeral representation for Isabelle recently, and I would like to share it with everyone. An overview of the design is now available on the Isanotes wiki [1]; a patched version of the Isabelle hg repo is also available [2]. I would welcome any

Re: [isabelle-dev] proposal for new numeral representation

2011-11-25 Thread Florian Haftmann
class neg_numeral = group_add + one definition (in neg_numeral) neg_numeral :: bin = 'a where neg_numeral k = - numeral k Is there a conceptual point for neg_numeral, beyond concrete syntax issues? One could just use regular uminus, but then there will be an accidental change in

[isabelle-dev] proposal for new numeral representation

2011-11-24 Thread Brian Huffman
Hi all, I have been working on a new numeral representation for Isabelle recently, and I would like to share it with everyone. An overview of the design is now available on the Isanotes wiki [1]; a patched version of the Isabelle hg repo is also available [2]. [1]