From the wikipedia, https://en.wikipedia.org/wiki/Winding_number#Complex_analysis, we can see the definition of winding number in complex analysis. 2 dimensions And so we can adapt it to geometric al… ...more

Cheap headphones sound bad because their frequency response is all messed up. You can considerably improve this by using an equalizer. Assuming you are using pulseaudio. First, install pulseeffects a… ...more

I've ported an old game I made in inform7 to javascript. It is filled with teenager angst, because I made the game in order to deal with some problems I was having back them. Alone in the darkness by … ...more

Pictures of me with animals! Usually in open spaces! Each of them with a story behind them! From recent to old. ...more

Until 2010 there were no website in Brazil one could access to learn about what science olympiads existed nor how to study for them. The only way to learn about the existence of the competitions was t… ...more

Taking care of a baby deer. College app essay, partially erased and adapted to protect personal information. Baby deer When I was fourteen, I was designated the responsibility of caring for a rescued… ...more

Makes gif animated in orgmode. From the org-inline-image package, with minimal modification ( the only change is testing if the figure is an image by checking the 'org-image-overlay, instead of the cu… ...more

Automatic toggle latex fragments in orgmode when point is in them. I found a solution by Konstantin Kliakhandler, based on a solution premade by John Kitchin. The code worked fine, however, it was fai… ...more

This is the code that runs this blog! I might as well have it here as well! #! /bin/sh ":"; exec emacs --no-site-file --script "$0" "$@" # -*-emacs-lisp-*- ;; Th… ...more

I read an amazing comment on reddit about how to very easily record the screen into gifs and I'll report it here with some improvements. All of this can be used in any other window manager, as long as… ...more

So during my life I have helped take care of multiple birds (bem-te-vis, parrots, toucans, large hawks, tiny hawks, vultures, sparrows, doves, humming birds, canaries, woodpeckers, etc), usually baby … ...more

This IAP others 6.006 TAs and I organized 6.s092! Mid semester I went to a SIPB meeting where they were discussing IAP classes and I decided that I decided that organizing a class would be a great ide… ...more

After I wrote my last two tiny projects, Scan with webcam, and Export Subtree with files I was ready to do one of my psets in org mode. It was absolutely fantastic. Scanning images with my webcam made… ...more

I was solving a pset, and realized that I needed to draw a graph by hand and include it in my solution. I didn't want to deal with taking a picture with my phone and sending the picture to my computer… ...more

Update: Now this is on on github, in the repo org-export-with-files. It is fairly usable and fairly useful. The next step is to figure out how to best deal with custom links. Summary I have a main org… ...more

For a 006 student piazza question. Te student liked my answer so I decided to share! Work per level: Suppose you have: $$T(n) = a T(n/b) + n^c$$ The amount of work done on the root of the tree is: $$n… ...more

I've always felt that I am more productive when I share my work or study with others. This caused me to have 3 main blogs/websites in the past. 1 was focused in national and international science ol… ...more

UPDATE: This documents my first experience with programming in elisp. In restrospect, I was really bad at it. This post then shows that you can still make something with elisp even if you are bad at i… ...more

Backup here: Groebner_Basis Here is the pdf with better formatting: GroebnerBasis–Sage Figures CSS <./css/sagemath.css> ...more

My friends and I built an led matrix with 30x60 pixels. This post will focus mainly on the software, but first, let's skim through the hardware. Material: 70 meters of ws2812 strips A 90 amps, 5v pow… ...more

Summary: Photographing linear panoramas of murals, in a place with poor light conditions, and short distance to the wall. Intro Photographing the murals in my dorm is a really challenging task. The di… ...more

This is a reblog from my old blog. The missing college essay that was too personal is the one that was adapted to the baby deer post. I was admitted in Harvard, MIT, Yale and Princeton :) [2013-03-29… ...more