## Free Textbooks in Mathematics

Fri, 02/24/2017 - 08:00 — yonatan zilpaThe following is a list of links to useful textbooks in mathematics, available for free on the Internet. All books are legally safe to download, The books are in printable format - Postscript (PS) or Portable Document Format (PDF). You are free to download, read and print them. This is a partial list of "free textbooks" in math, the list is to be updated regularly.## how to use reverse and forward search with vim and zathura

Thu, 05/16/2019 - 13:00 — yonatan zilpaA simple way to do forward and reverse search with Vim and Zathura.- Read more about how to use reverse and forward search with vim and zathura
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## Asymptotic Differentiable Function

Thu, 11/24/2016 - 14:45 — yonatan zilpaLet $f$ be any function asymptotic at zero. Prove/Disprove:

If $f$ is differentiable everywhere in its domain, then $\lim_{x\to \infty}f\;'(x)$ must be equal to zero?- Read more about Asymptotic Differentiable Function
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## The circle of Apollonius

Fri, 02/26/2016 - 17:05 — yonatan zilpaBy definition, a circle is the locus of all points equidistant from a fixed center. However, the circle of Apollonius is defined differently. In the following post I will define and construct an Apollonian circle.- Read more about The circle of Apollonius
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## Minimum way to move all circles

Thu, 11/24/2016 - 13:04 — yonatan zilpaConsider a game with three vertical sticks and 5 circles, where each circle has a hole in the middle. The circles arranged in one stick as shown in the picture: The task is to move all the circles to a nearby stick, circles can be move from one stick to another, but a circle cannot be put over a smaller one. What are the minimum number of steps needed to complete this task?- Read more about Minimum way to move all circles
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Normally **Tex typesetting system** distribution (such as TexLive, MikTex or TeTex) comes with a builtin help commands that provides excellent tutorials, books and plenty other documentations. Of course, the best way to learn it is to use it, so let's play with commands:

- Read more about Getting help in Tex Typesetting System
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The following list links to free computer tools for mathematics.

- Read more about List of Computer tools in mathematics
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Let $\lambda$ be Borel measure.

- If $A$ is mesuarable and $\lambda(A)>0$, then $A-A=\left\{ x-y\; :\; x,y\in A \right\}$ contains a segment $I$ such that $0\in I$
- If $A, B$ are measurable sets and $\lambda(A), \lambda(B)>0$, then $A+B$ contains a segment I.

- Read more about Steinhaus theorem
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Links to guides blogs and tutorial in computer security.

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The sequence of Fibonacci can be found everywhere in nature. First mentioned by Leonardo Fibonacci who was a medieval mathematician that was trying to solve problem involving the growth of a population of rabbits. It became one of the most famous sequence in all of mathematics. Here is a mathematical description of some of its fundamental properties...

- Read more about Fibonacci Sequence, A Pattern of Natural Beauty
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