3-sphere two 3-balls. This construction is analogous to a construction of a 2-sphere, performed by gluing the boundaries of a pair of disks. A disk is a 2-ball, and the boundary of a disk is a circle (a 1-sphere). Let a pair of disks be of the same diameter. Superpose them and glue corresponding points on their boundaries. Again one may think of the third dimension as temperature. Likewise, we may inflate the 2-sphere, moving the pair of disks to become the northern and southern hemispheres. After removing a single point from the 2-sphere, what remains is homeomorphic to the Euclidean
Half a Life (memoir) could in no way have avoided the accident, the book details his attempts, over half his life, to come to terms with his feelings of responsibility. "Half a Life" was enthusiastically received by critics here and abroad. Writing in "The Guardian", writer and critic Robert McCrum called the book "a masterpiece...'Half my life ago, I killed a girl'. You'll rarely get a better first line. What follows—Strauss's precise, honest and rigorous account of a fateful road accident and its harrowing aftermath—fulfills every hope aroused in the casual reader. What starts as an 18-year-old's carefree outing in his father's car leads