# Brain dump

## Homogeneous (Physics)

##### October 21, 2020
Physics

Homogeneous means that location is not preferred, that the physics are the same at any point. Specifically, in …

## Generalized Coordinates

##### October 21, 2020

Generalized coordinates are useful when calculating Lagrangians or Hamiltonians. The term itself, refers to the … ...

## General Relativity

##### October 21, 2020
Physics

Concepts # Inertial Frames Newtons Laws of Motion

## Galilean Transformations

##### October 21, 2020

In Newton’s formulation of spacetime, time is an absolute; meaning that every observer experiences the same flow … ...

## Flatness Problem

##### October 21, 2020

Overview # In the Big Bang model there are multiple parameters which appear to be “fine tuned” in that, … ...

## Equations of Motion

##### October 21, 2020

Linear Motion # (under constant $$\hat{\mathbf{a}}$$) \mathbf{v} = \mathbf{a}t + \mathbf{v_{0}}\tag{1} …

## Emacs Notes

##### October 21, 2020
Emacs

Emacs notes (doom emacs) Org # handy cheatsheet: https://orgmode.org/orgcard.pdf To get a TODO item created on the … ...

## Degenerate Coordinate Systems

##### October 21, 2020
Physics

Any coordinate system which cannot describe an entirety of a space As an example, polar coordinates $$r,\psi)$$ are …

Physics

TODO #

## Cosmic Inflation

##### October 21, 2020

Inflation # Inflation (Cosmic) is a theory put forth (originally, by Alan Guth in his 1980 paper) to explain why, if … ...