Category Archives: Math

Plotting 3D graphs using Python and Tellurium

As an example I wanted to show how one could plot a 3D phase plot. A great example to use for this is the Lorenz Attractor. This system is interesting because it displays chaotic behavior. The differential equations for the … Continue reading

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-1 times -1 = +1 ?

My brother asked me the other day why -1 times -1 was +1. It’s the sort of rule we learn at high school and perhaps never think about again. I thought I’d add a note to prove and show why … Continue reading

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Solving ODEs using Mathematica

Solving ODEs using Mathematica I have found that the documentation that comes with Mathematica is not always very helpful. At least it is not very helpful when you want to know the most common operations. One of those is solving … Continue reading

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Useful LaTex Documents

Here are some very useful documents on LaTeX that I have come across over the years: 1. Comprehensive Symbol List The comprehensive symbol list includes 5913 symbols and the corresponding LaTeX command by Scott Pakin 2. Math Mode A highly … Continue reading

Posted in LaTeX, Math | 2 Comments

Proportional and Relative Changes

There is an excellent description of the difference between logarithmic and linear scales in the book “Mathematical Analysis for Economists” by R Allen which I describe here. Consider the following two sequences of numbers: 100,  150,  200,  250,    300,     100,  … Continue reading

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