http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
The riddle -- Primes -- Some geometry -- Mysterious pattern -- Some things add up, some don't -- A tangential remark -- Plus or minus -- Making the optimal choice -- Impossibilities -- Magnitudes of infinity -- The inevitable (Sperner's lemma; the Brouwer fixed-point theorem) -- Consider the sequence (Fibonacci and golden ratio) -- What are the chances? -- The Euler line -- The dissertation -- The next prime number is? (Gandhi's formula) -- Bulgarian solitaire -- Which is bigger? (ab versus ba) -- Fascinating -- From the sublime to the ridiculous -- A few more words -- Photos and pictures -- Notation, etc -- Mysterious -- Impossibilities -- Magnitudes -- Fascinating.