# Mathematical Concepts

## Elasticity

Graphs

- Calculating Elasticity using the Midpoint Method
- Elasticity along a Linear Demand Curve
- Elasticity along a Linear Demand Curve (Point-Slope Method)
- Elasticity along a Linear Demand Curve (Full Derivation)
- Demand with Constant Price Elasticity (old version)
- Demand with Constant Price Elasticity (old version, with calculus)
- Price Elasticity along a Linear Supply Curve (old version)
- Supply with Constant Price Elasticity (old version)
- Constant Elasticity Demand and Logs

## Multivariable Calculus

Graphs

- Plotting Multivariable Functions
- Level Sets
- Contour Maps
- Definition of a Derivative
- Partial Derivatives with Respect to X
- Partial Derivatives with Respect to Y
- Plotting a “Slice” of a Multivariable Function
- Total Derivative Along a Path
- Total Derivative Along a Level Set
- Slope of a Tangent to the Level Set Passing Through a Point

## Optimization

Graphs

- Derivative of a Univariate Function
- A Univariate Function with a Single Unconstrained Global Maximum
- A Multivariate Function with a Single Unconstrained Global Maximum
- Multivariate Constrained Optimization
- Multivariate Constrained Optimization: Lagrange Multiplier Method
- Multivariate Constrained Optimization: Level Sets