## 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.## 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.## Conceptual Language and Learning

Mon, 12/26/2016 - 15:17 — yonatan zilpaNormally when we learn human spoken language we translate words to our own mother tongue language. But when we learn our mother tongue language we have no language to translate new words. How do we understand mother tongue without translating words? Is there some kind of conceptual language where we can translate mother tongue new words? And if so, can we use this conceptual language to become better learner?- Read more about Conceptual Language and Learning
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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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## Getting help in Tex Typesetting System

Wed, 05/15/2019 - 04:36 — yonatan zilpaNormally**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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## Google search tips

Thu, 11/24/2016 - 14:40 — yonatan zilpaTips and tricks on Google search techniques.- Read more about Google search tips
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## Finding which package provides a command

Tue, 05/14/2019 - 00:46 — yonatan zilpaSuppose a command is not available in the system and we need to install it. How do we find a suitable package that provide this command? In Debian or Ubuntu we can simply run the following command- Read more about Finding which package provides a command
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## Cybersecurity links

Fri, 02/24/2017 - 16:35 — yonatan zilpaLinks to guides blogs and tutorial in computer security.- Read more about Cybersecurity links
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## List of Computer tools in mathematics

Fri, 02/26/2016 - 16:53 — yonatan zilpaThe following list links to free computer tools for mathematics.- Read more about List of Computer tools in mathematics
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## Hahn Decomposition Theorem

Thu, 11/24/2016 - 14:07 — yonatan zilpaLet $\nu$ be a signed measure over measurable space $(X,\mathcal{M})$. Denote $\tilde{N}=\left\{ u\in \mathcal{M} \; :\; \mbox{$u$ is $\nu$-negative} \right\}$ and $\tilde{P}=\left\{ u\in \mathcal{M} \; :\; \mbox{$u$ is $\nu$-positive} \right\}$- $\exists N\in \tilde{N}\Big(\exists P \in \tilde{P}\Big( N\cap P=\emptyset \; \mbox{ and }\; N\cup P = X\Big)\Big)$
- $\forall N,N^{'}\in \tilde{N}\Big(\forall P,P^{'}\in \tilde{P} \Big(N\sqcup P =N^{'}\sqcup P^{'}=X \; \Longrightarrow \nu( P\triangle \tilde{P})=\nu( N\triangle \tilde{N})=0\Big)\Big) $

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