Professor of Mathematics (Emeritus)

Loyola Marymount University

Los Angeles, CA

Here are some examples that use Calc-50 programming and graphics (along with some neat math).

Program Fourier series using the sum key and display with plot.

Fourier series

**
**

Evaluate infinite sums to high precision.

Infinite sums

**
**

Analyze the rate of convergence of an infinite sum.

Arctan sum

**
**

Find a closed-form expression for a complicated integral.

Experimental Math

**
**

Evaluate an infinite nested sequence of radicals.

Use the sum key as a loop control and the select key as an if statement.

Nested radicals

**
**

Evaluate the limit of a sequence using extrapolation.

Approximate infinite sums, products or limits.

Extrapolation

**
**

Evaluate an infinite sum with only prime terms.

Define the prime counting function and try extrapolation to get more accuracy from a sum.

Prime sum

**
**

Derive a Guass quadrature integration rule.

Evaluate Legendre polynomials, and use combinations, derivatives, sums, equation solving.

Derive a Guass quadrature rule

**
**

Solve an equation where the function involves an integral.

The solve key calls a function which in turn calls the integrate function.

Solve an integral equation

**
**

Solve an ordinary differential equation and do a list plot of the solution.

Call the ode function repeatedly to make a list of points y(x(i)), and then plot the list.

Solve a differential equation

**
**

Use ode called from the solve function for a boundary value problem.

Define a function with a root that gives the solution to a boundary value problem.

Solve a boundary value problem

**
**

Estimate values for partial sums of a divergent series.

Derive an asymptotic formula to approximate a finite sum.

Asymptotics

**
**

Estimate the value of a double sum.

Use the sum key with a function that also uses the sum key.

Generate partial sums and then extrapolate.

Double sum

**
**

Estimate the number of primes less than a large number.

Compare the prime number theorem, log integral, and Riemann's prime counting function.

Define a function for the Moebius function from number theory.

Prime counting

**
**

Compute the integral of a function that has infinitely many oscillations with

ever increasing amplitude as x approaches zero.

Oscillating integrals

**
**

Use the complex arithmetic screen to sum a complex series.

Complex sum

**
**

Use the complex arithmetic screen to search for complex roots of an equation.

One example uses complex secant iteration for approximating roots.

Another example evaluates complex line integrals to count the number of roots within a

specified circle in the complex plane.

Complex roots

**
**

Back to the main Calc-50 page