Welcome to $\Sigma$, a collection of links, reviews and similar.


The symbol ‘★’ means highly recommended but you already knew this.

The symbol ‘’ means legendary which you didn’t know.


Fiction/Non fiction.

The ratings are totally personal which will differ from person to person. A more up to date list is at Goodreads.


These are some books I have read and find them worth.


  • Linear Algebra Done Right, Sheldon Axler
  • Principles of Mathematical Analysis, Walter Rudin
  • Calculus, M. Spivak
  • A First Course in Complex analysis, Dennis G. Zill and Patrick Shanahan
  • A Book of Abstract Algebra, Charles Pinter
  • The Princeton Companion to Mathematics, Timothy Gowers et al
  • How to solve it, G Pólya
  • Elementary Number Theory, David M Burton
  • Topology, Munkres

Computer Vision $\cup$ Machine Learning

  • Computer Vision: Algorithms and Applications, Richard Szeliski
  • Computer Vision: Models, Learning, and Inference, Simon J. D. Prince
  • Learning OpenCV3 Computer Vision in C++ with the OpenCV library, Adrian Kaehler and Gary Bradski

Machine Learning ( Deep Learning $\in$ Machine Learning)

  • Pattern Recognition and Machine Learning, Christopher M. Bishop
  • Elements of Statistical Learning, Trevor Hastie, Robert Tibshirani, Jerome Friedman
  • Deep Learning, Ian Goodfellow et al.


  • An Introduction to Neural Networks, James A. Anderson ( Neurobiology and Neurocomputingl )
  • Principles of Neural Design, Peter Sterling.

Popcorn, TV and Insomnia.

I watch mosly science fiction and animation. A more up to date list is here on letterboxd.

  • [Dunkirk, December, 2017] Don’t loose hope just like the sheppard’s tone.
  • [Blade Runner 2049, November, 2017] Best Neo-noir post apocalyptic cyberpunk science fiction.
  • [Spiderman Homecoming, 2017] Meh. It’s okay.
  • [Star Wars: Rogue One] ★ The much needed filler.
  • Kong: Skull Island [DON'T WATCH!] [June, 2017]
  • Fate of the Furious [Submarine!] [June, 2017] ★
  • Furious 7 ★ [June, 2017]
  • Fast & Furious 6 (2013) [June, 2017]
  • Guardians of the Galaxy 2 [ It’s g(r)oood! ][ May, 2017 ]
  • Logan [Man, I cried.] [May, 2017]
  • [Doctor Strange][Suddenly, my favourite superhero and movie.] ★
  • [Moana][Fluid Simulation to extremes] ★

Hall of fame:

  • [Big Bang Theory S1-11] Nerds acting with humour.
  • [Rick and Morty S1-3 (Adult Swim)] In Elon Musk’s words, “Digustingly Good”.
  • [The Grand Tour (Prime Video) ] Jezza, Captain Slow and Hamster + GWiz, ‘nuff said.
  • [Castlevania ( 2018, Netflix )] Badass animation + Dracula + Alucard + Belmont = !!!

Video Games

(the platform I write is the one I played on, it may be available for your favourite platform too. )

Hall of fame:

  • Clash Royale, Supercell . Easily the best mobile game I have played. Deep amazing stategic plays and every, every game is unique. Brilliant game design. This “card based real time tower rush multiplayer” game is worth playing. I have invested over 250 hours on this.

  • Opus Magnum, Zachtronics , [Steam, MacOS] :- puzzle-based programming game which gives you absolute freedom to craft and create machines to accomplish alchemical tasks. It’s satisfying, it’s complex and it pushes you to optimize your solutions. If you’re into programming, please, play this masterpiece by Zachtronics.

  • Celeste, Matt Makes Games , [Steam, MacOS] Tight controls, amazing pixel art, a badass OST and a touching story all sewn together in perfect symphony to sing the song of the best platformer for years to come.
  • Kerbal Space Program, Squad ★, [Steam, Windows] Jebediah Kerman has a bad privacy policy. I still like Jebediah Kerman though.
  • Factorio, Wube Software, [Steam, Mac] , the crack for programmers. Cractorio. Warning, don’t play this if you respect your time.
  • Skyrim, Bethesda [PC] , see that peak? That’s where the game rests. Bethesda’s Opus Magnum.
  • RuneScape, Jagex [Mac] , F$**$k, nearly wasted my life. I have put 1200+ hours spanning 9 years.