Dafuq is that

Dafuq is that

PKM, Product Management, Insights & Self-expression


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  • Burnside’s Lemma: Proof and Application

    In the previous post, I proved the Orbit-Stabilizer Theorem which states that the number of elements in an orbit of a is equal to the number of left cosets of the stabilizer of a.  Burnside’s Lemma Let’s us review the Lemma once again:   Where A/G is the set of orbits, and |A/G| is the cardinality of this set. Ag is the […]

    14 Oct 2018
  • Burnside’s Lemma: Orbit-Stabilizer Theorem

    Problem: Given a 3 by 3 grid, with 5 colors. How many different ways to color the grid, given that two configurations are considered the same if they can be reached through rotations ( 0, 90, 180, 270 degrees )? This problem was given in my Number Theory course. Somehow when I searched for the solution, […]

    13 Oct 2018
  • Bottom-up parsers

    An in-depth discussion about bottom-up parsers’ concept, data structure and algorithm.

    12 Oct 2017
  • Top-down parsers

    Context-free grammar: What and Why ? Introduction to top-down parsing.

    22 Sep 2017
  • Scanner: Categories

    Types of scanners and their core’s algorithms.

    19 Sep 2017
  • Scanner: Automata and Regular Expression

    from Regular Expression to Nondeterministic/ Deterministic Finite Automata.

    18 Sep 2017
  • Concurrency control

    Serializability, Precedence Graph, Locking, Logging.

    10 Aug 2017
  • Naive Bayesian Spam Filter

    Application of probability in implementing Naive Bayesian spam filter.

    29 Jul 2017
  • Linear Algebra – Things unsaid

    Connecting the dots between various seemingly heterogenous concepts in linear algebra.

    22 Jul 2017
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