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Formal Logic Framework

Project description

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A Formal Logic framework for a variety of applications.


From PyPI

forseti is available on PyPI.

$ pip install forseti

From source

  • Download the source code:
$ git clone
$ python install


forseti comes with an internal representation of propositional calculus formulas (atomic, not, and, or, implication, and equivalance). It can generate this from a functional representation of any formula. Interally, it holds everything as formula objects, which can take in other formulas as appropriate (Symbols can only hold one string).

An example:

from forseti import parser
from forseti.predicate import Atomic, And
assert parser.parse("and(a, b)") == And(Atomic('a'), Atomic('b'))

Additionally, it also comes with a builtin prover that can validate a propositional calculus argument

from forseti.prover import Prover
prover = Prover()


  1. First Order Logic Prover
  2. Optimizations


These projects use forseti at their core:

  1. Truth Tables


Using forseti to implement the following programs/applications

  1. Automated Theorem Prover (done in forseti core)
  2. Implement Davis-Putnam Algorithm
  3. Truth Trees
  4. Slate / Fitch

Project details

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Files for forseti, version 0.8.1
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