## Author Archive

## Introduction to Transfinite Number (No Prerequisite Knowledge!)

by Christopher Olah on May.05, 2011, under Workshops

On Monday May 16th, 19-21:00, I’ll be doing an introduction to transfinite numbers. Topics will include:

- Cardinals and Ordinals
- Cantor’s Diagonalization Argument
- The Continuum Hypothesis
- Transfinite Induction

Transfinite numbers are really cool, since, well they deal with infinity, don’t match your intuition’s about infinity, and have a tendency to drive people insane!

Unlike previous math workshops, there is no prerequisite knowledge for this workshop. It should be lots of fun! I hope to see you there.

*:*Events, workshop more...

## Integral Transform Workshop

by Christopher Olah on Apr.03, 2011, under Uncategorized

On April 25th, at 7pm/1900, I will be doing an integral transform workshop. This workshop will introduce ideas like convolution and the Fourier Transform (and possibly L² Spaces, the Laplace transforms or Fourier Series). Examples of applications will include solving PDEs.

Integral Transforms and the Fourier transform in particular are very powerful ideas. The Fourier transform changes from looking at functions in terms of amplitudes at points in time to amplitudes at frequencies. It has applications to audio and image processing; see examples of what it does to these images (though note that the author is using discrete 2D Fourier transforms, which are a little different from what I’ll be showing).

They’re also very useful in ODEs and PDEs, making them invaluable in physics, including electronics.

NOTE: You should know what derivatives and integrals are if you intend to come to this workshop. I’m really sorry, but I simply won’t have time to teach introductory calculus and cover this material. And it isn’t nice for people who do know calculus if I try to do so.

## OpenSCAD Workshop

by Christopher Olah on Mar.22, 2011, under Events

I’m going to be running an openSCAD workshop on April 4th at 19:00.

OpenSCAD is a lot like a programming language except that instead of compiling into software it compiles into a 3D object. You have if statements, loops and functions. For a lot of purposes, it is way easier than using traditional 3D modeling software.

For example, it’s what the Hacklab RepRap is being developed in.

No reservations are necessary. It would be preferable for you to install it before coming (Ubuntu Users: there’s no package in the archives but you can use this PPA).

I hope to see you there!

*:*workshop more...

## LaTeX Workshop

by Christopher Olah on Jan.20, 2011, under Uncategorized

I’m happy to announce that I’ll be running an introduction to LaTeX workshop on February 7th. What is LaTeX? LaTeX is a text markup language; instead of typing in word processor like MS Word or Open Office, you type in plain text and then compile it to a format of you choice, such as PDF. Unlike HTML, LaTeX is not terribly cumbersome to type by hand.

LaTeX is the industry standard for math and science publication. Look at a random math paper or book, at you can be very confident it was written in LaTeX. But LaTeX is also capable of doing many things other than writing papers, including slideshows and posters. Here’s an example, a sideshow I made in grade 11. As another example, I made this image in LaTeX for digimer.

This workshop is only an introduction. By the end you will be able to create simple documents and typeset equations. If there is time and interest, I will go into how to make slideshows and the basics of diagrams.

This workshop is open to everyone — that includes non-members. It will start at 7pm.