Here are a few noteworthy posts I’ve seen in the math blogosphere recently:

• A post at Wild About Math regarding magic squares and Martin Gardner.
• Dave Richeson blogs about transcendental numbersand algebraic numbers of the form trigfunction(πθ) . (Seems like this would apply the hyperbolic trig functions too, right?). Dave also shares this festive mathematical pumpkin π. Happy Thanksgiving/Halloween!

• Denise at Let’s Play Math asks us to solve some chess puzzles.
• Dave at Math Notations gives us a recursive sequence to think about.
• There are two new problems at Math Challenges, here and here.