Blog Posts & Events

Typed transitions, finite state machines and free categories
Published 25 VIII 2018In this post I model finite state machines using free categores; you will also get a gentle introduction to Kelisli categories, folds on free categories and finally tagless style. Based on a simple example of an FSM by Oscar Wickström.

Monadicity
from algebras to monads and back to algebrasPublished 9 VIII 2018Introduction to the monadicity theory based on freealgebras Haskell package.

Free algebras
haddock documentationLink to
freealgebra
package on hackage. 
From free algebras to free monads
Publishded 30 VII 2018The post was republished on iohk blog.
Introduction to Universal Algebra, a mathematical discipline that is hidden under many constructions in Haskell ecosystem. It is more concrete than Category Theory, and hence often easier to understand. It is also a very useful source of examples in Category Theory.

Composing cofree intepreters
Published: 30 VIII 2018My talk at Monadic Warsaw Haskell meetup on PureScript type system and composition of cofree comonads.

Workshop on Category Theory
Published: 12 VI 2018Workshop I gave at Monadic Party. Unfortunatelly, first 30 minutes of the recording was lost...

Routing with cofree comonad
Published: 14 X 2017My talk at PureScript Conf 2017 (a satelite event of Lambda Conf 2017) about routing frontend applications using coffree comonad and modelling DOM with
Coffree []
. 
Peano Algebras in Haskell
Published: 2017Fun with Peano axioms in Haskell.