Author: jeremy
The Rational Roots Theorem
One of the skills students learn in secondary school is to factor quadratic expressions. In particular, they learn how to solve equations like x2+2x+1=0. There are a slew of techniques one can use to deal with quadratics, and they mostly rely on the fact that questions asked in assignments and tests have “nice†factorizations. Most expressions have integer solutions, or at worst rational ones. This makes it straightforward to factor. Of course, this might take…
Sets
Process
Changing your perspective from one of “getting good grades†to one of “understanding concepts deeply†is probably the best thing you can do for your education.
Recall
Mathematics Isn’t Just Numbers
We often equate mathematics with numbers, as if mathematics doesn’t extend further than doing arithmetic. Each time this happens, I have to restrain myself from going on a rant. I want to grab the person by the collar and exclaim, “There’s so much more to mathematics than just numbers! It’s like saying that running is just a bunch of one-legged hops. While that might be technically true, it’s not the way most people would describe…
Pseudowork
I can kind of understand why people do this, but really, it’s not the work you should be spending your precious time on.
Degeneracy of the Quantum Harmonic Oscillator
Note: This post uses MathJax for rendering, so I would recommend going to the site for the best experience. I just love being able to find neat ways to solve problems. In particular, there’s something about a combinatorial problem that is so satisfying when solved. The problem may initially look difficult, but a slight shift in perspective can bring the solution right into focus. This is the case with this problem, which is why I’m…
Probabilistic Multiple Choice
It’s amazing the amount of “bad†answers you can eliminate just by using the fact that your teacher is making a test.
