Version 4.3.16

Version 4.3.16 of the KeYmaera X Theorem Prover

• [Tactics] Three new tactics for automatic approximation of {e'=e} and {s'=c, c'=-s}
  out to n terms in the series expansion.
  • circularApproximate(s,c,n,pos): For circular dynamics {s'=c, c'=-s}.
  • expApproximate(e,n,pos): for {e'=e}.
  • autoApproximate(n,pos): Tries to find {e'=c} then tries to find.
    {s'=c,c'=-s} and applies the relevant approximation tactic.
• [UI] The startup sequence is improved.
  • The status indicator now actually indicates status.
  • We no longer automatically open a browser window on Linux, since this
    caused hanging on some machines.
• [UI] Formula editing
  • Expand functions min/max/abs, e.g., expand(abs(0)) >= 0
  • Abbreviate terms, e.g., x+abbrv(2+3,five) >= 0
• [UI] Search and apply lemmas
  • Auto-completion search box in the formula dialog
  • Click lemma subformulas to adjust the direction in which lemmas are applied
• [Parser] Bug fix in how numbers are pretty-printed.
• [Tactics] Various improvements to the tactics framework and standard library.

Version 4.3.15

Version 4.3.15 of the KeYmaera X theorem prover

• UI: Improvements to presentation and /show mode
• UI: Render nullary function symbols without parentheses
• Updates Z3 to 4.5.0, improved QE support for machines without Mathematica.
• Improved update code for Windows.

Version 4.3.14

Version 4.3.14 of the KeYmaera X theorem prover.

• Fix: ODE solve tactic printing

Version 4.3.13

Version 4.3.13 of the KeYmaera X theorem prover.

• New: model editing
• New: proof step justification with rule/axiom in proof browsing
• Feature preview: exercise models with placeholders
• Web UI and backend fixes

Version 4.3.12

Version 4.3.12 of the KeYmaera X theorem prover

• New: step-by-step proof browsing
• New: tactic tooltips on proof step in sequent proofs
• Improved proof step highlighting
• User interface and backend stability improvements

Version 4.3.11

Version 4.3.11 of the KeYmaera X theorem prover.

• Substantially improved Web UI performance by significant factors.
• New: Built-in text editor to edit new models from Models->New Model->Edit.
• New: New models can be started from plain differential dynamic logic formulas without variable declarations.
• New: Abbreviate terms when editing formulas with special function symbol abbrv(term) or abbrv(term, abbreviation). For example x+abbrv(3+2, v) > y becomes x+v > y, v = 3+2 with all occurrences of 3+2 replaced by v.
• New: browse model archives on web.keymaeraX.org/show/http://url/of/my.kya or on localhost
• New: Unicode syntax (beta)
• Improved differential cuts: refer to initial values of arbitrary terms with old(term) and support for multiple uses of old(term)
• Improved syntax for differential ghost tactic: dG({y’=F}, {G})

Version 4.3.10

Version 4.3.10 of the KeYmaera X theorem prover. Changes:

• Bug fixes to model import.
• Mathematica/QE: Use TCP-based link to Mathematica instead of MathLink.
• Mathematica/QE: Improved QE logging
• Improvements to diamond ODE solver.
• GUI: equality rewriting is now displayed in context menu and available as default left-click operation on equalities.
• GUI: dL and Bellerophon syntax hi-lighting.
• GUI: Proof hints on how to proceed.

Version 4.3.9

Version 4.3.9 of the KeYmaera X Theorem Prover.

• New: Tactic input validation to prevent impossible proof attempts
• New: function and predicate definitions in .kyx model file functions block
• Performance improvements in user interface
• Early preview: model syntax highlighting

Version 4.3.8

Version 4.3.8 of the KeYmaera X theorem prover. Changes:

• Performance improvements
• Improved support for game proofs (<*> diamond convergence)

This release requires manual steps by the user to convert data from databases
created by 4.3.7 or older.

Version 4.3.7

Version 4.3.7 of the KeYmaera X theorem prover.

Change log:

• if/then/else syntax
• Improvements to diff solve and ODE tactics.
• Added tactical support for open differential induction.
• Mathematica conversion robustness improvements (double to rational translation)