Welcome to Idius Land!.  I'm currently in the process of overhauling the site.  I'm working on the overall structure and planning the content. This web site is mostly a hobby, so progress is slow. Thus far, I have only added these new pages:

The Pythagorean theorem
Integration by parts
Research log
web log (Across the Universe)
Completing the square
About Idius Land!
Euler's formula
Pretty Parametric Plots
About Pretty Parametric Plots
The quadratic formula
Inverse trig function derivatives
Implicit differentiation
My research
Photo gallery
The product rule
Complex trigonometry
Approximation in Physics
Leave a comment
Contravariant vs covariant
Complex numbers
Physics resources
Inverse trigonometric functions
A Two-Point cubic spline
Vectorization with SSE