297 Reykjavik 79 rice covering chessboard 163 Rice's Theorem 267 Riemann Hypothesis 238, 257 Riemann surfaces 368 Ritchie, Graeme 310 Rivest, Ron 165 Robinson Davis Matiyasevich theory 248 HOUSE_OVERSIGHT_016105 416 Are the Androids Dreaming Yet? Robinson, Julia 248, 251 Robinson, Sir Ken 299 Rogers and Hammerstein 266 Ro