"Pure mathematics is, in its way, the poetry of logical ideas."
- Albert Einstein.
Elizabeth Zimmerman's pi architecture for shawls has such a mathematical simplicity to it—double the number of stitches at a halving rate—that pleases the scientist in me. This formula results in a flat circle. To celebrate the mathematical beauty of pi, this shawl uses the simplest of lace patterns. Increase rows disappear into the overall pattern, with one extra increase round at the end to produce a hint of a ruffle. This light and airy small shawl is easy enough to knit while pondering other mathematical mysteries (or watching TV).