## Bold text and symbol

Objective is to represent bold text or symbol in LaTeX. Example 1. Bold Text Code Hello! Welcome to the \textbf{Study Astrophysics}. Result Example 2. Bold inside an equation Code \mathbf{A} \cdot \mathbf{B} \equiv AB \cos\theta Result Example 3. Bold Symbol Code \boldsymbol{\lambda} Result Reference https://www.sharelatex.com/learn/Bold,_italics_and_underlining http://study-astrophysics.com/griffiths-01-01/

## Table

Objective is to represent a table using LaTeX. Example Code \begin{tabular}{|c|c|} \hline Classical Mechanics & Quantum Mechanics \\ (Newton) & (Bohr, Heisenberg, Sch\”odinger et al.) \\ \hline Special Relativity & Quantum Field Theory \\ (Einstein) & (Dirac, Pauli, Feynman, Schwinger et al.) \\ \hline \end{tabular} Result Reference https://www.sharelatex.com/learn/Tables#Tables_with_fixed_length

## Equation array

Objective is to represent equation array using LaTeX. Example 1. Code \begin{equation} \left. \begin{array}{lllll} \lambda_{11} & = & \cos(x’_1,x_1) & = & \cos\theta \\ \lambda_{12} & = & \cos(x’_1,x_2) & = & \cos \bigg( \frac{\pi}{2} – \theta \bigg) = \sin\theta \\ \lambda_{21} & = & \cos(x’_2,x_1) & = & \cos \bigg( \frac{\pi}{2} + \theta \bigg) = – \sin\theta \\ \lambda_{22} & = & \cos(x’_2,x_2) & = & \cos\theta \end{array} \right\} \end{equation} Result Example 2. code \begin{equation} \begin{array}{rcl} \vec{A} \cdot \vec{r} & = & A_1 x_1 + A_2 x_2 + A_3 x_3 \\ & = & A^2 \\ & = & A^2_1 + A^2_2 +…

## Matrix and determination

Objective is to represent a matrix and determination using LaTeX. Example 1. Matrix Code \left( \begin{array}{ccc} \lambda_{11} & \lambda_{12} & \lambda_{13} \\ \lambda_{21} & \lambda_{22} & \lambda_{23} \\ \lambda_{31} & \lambda_{32} & \lambda_{33}  \end{array} \right) Result Example 2. Determination Code (\vec{A} \times \vec{B}) \cdot \vec{C} = \left| \begin{array}{ccc} A_1 & A_2 & A_3 \\ B_1…

## LaTeX Introduction

LaTeX is the fundamental tool for creating papers. If you have to write a dissertation, you are highly recommended to learn and use it. It is especially useful when you want to write math equations. In my blog, all equations are created using LaTeX (Luckily, WordPress supports LaTeX!). You can see that anywhere in my…

## MetaPost Introduction

I have posted some solutions since I’ve started this blog, I realized that some solutions needed appropriate figures. LaTeX is a great tool for describing equations and formula, but it’s not enough. So I’ve searched the Internet and found that MetaPost. MetaPost is a programming language that I’ve been looking for. I think I can…