TY - BOOK AU - Crilly,A.J. TI - 50 ideas you really need to know SN - 9781848667051 (hbk.) : AV - QA99 U1 - 510 23 PY - 2014///] CY - London PB - Quercus KW - Mathematics KW - Popular Science and Mathematics KW - ukslc N1 - Originally published: as 50 mathematical ideas you really need to know. 2007; Includes index N2 - Who invented zero? Why 60 seconds in a minute? How big is infinity? Where do parallel lines meet? And can a butterfly's wings really cause a storm on the far side of the world? Professor Tony Crilly explains in 50 clear and concise essays the mathematical concepts - ancient and modern, theoretical and practical, everyday and esoteric - that allow us to understand and shape the world around us ER -