# Brain dump

## Configuration Space

##### October 21, 2020
Physics

The vector space defined by generalized coordinates. Example: The position of a particle in Euclidean 3-space is …

## Cartesian Product

##### October 21, 2020

If $$X$$ and $$Y$$ are sets, then we define the Cartesian Product $$X \times Y$$ to be the collection of ordered pairs, … ...

## Cardinality

##### October 21, 2020

Equality in Cardinality # Two sets $$X$$ and $$Y$$ are equal iff there exists a bijection $$f : X \longrightarrow Y$$ …

## Black Holes as Primordial Dark Matter

##### October 21, 2020

source: Physicists Argue That Black Holes From the Big Bang Could Be the Dark Matter Primordial Black Holes # A … ...

##### October 21, 2020
Physics

High-level # The result of the marrying of QM with GR. (Initially, Hawking’s) calculations suggested that …

## Binary Relation

##### October 21, 2020

A binary relation $$R$$ over sets $$X$$ and $$Y$$ is a subset of the cartesian product of $$X \times Y$$. Where $$X$$ is …

## Abiotic Process

##### October 21, 2020
Chemistry

An abiotic process is a process which occurs via abiotic resources (non-living physical/chemical elements) in the …

## Abiotic Process

##### October 21, 2020
Chemistry

An abiotic process is a process which occurs via abiotic resources (non-living physical/chemical elements) in the …

## Bijective Function

##### October 21, 2020

A function is bijective or “invertible” if it is Both one-to-one and onto (injective and surjective) In …

## Set Theory

##### October 21, 2020
Math

Concepts # Relations Cardinality Binary Relation Symmetric Relation Transitive Relation Cartesian Product Reflexive …