In this proof without words, we prove wordlessly the identity:
ABOUT THE AUTHOR(S)
Now approaching its fortieth birthday, The Mathematical Intelligencer is a lively quarterly written in an engaging, informal style for a broad audience. It features expository articles about mathematics (broadly defined), about mathematicians (ditto), and about the history and culture of mathematics in its intellectual, social and scientific context. Puzzles, poetry and fiction appear in its pages too.