Framing global mathematics: the International Mathematical Union between theorems and politics Framing global mathematics: the International Mathematical Union between theorems and politics , by Norbert Schappacher, Cham, Springer, 2022, vii + 384 pp., $59.99 (hardback), $49.99 (paperback), ISBN 978-3-030-95682-0; (eBook) ISBN 978-3-030-95683-7 (available via Open Access)