Szemerédi's influence on today's mathematics, especially in combinatorics, additive number theory, and theoretical computer science, is enormous. This volume is a celebration of Szemerédi's achievements and personality, on the occasion of his seventieth birthday. It exemplifies his extraordinary vision and unique way of thinking. A number of colleagues and friends, all top authorities in their fields, have contributed their latest research papers to this volume. The topics include extension and applications of the regularity lemma, the existence of k-term arithmetic progressions in various subsets of the integers, extremal problems in hypergraphs theory, and random graphs, all of them beautiful, Szemerédi type mathematics. It also contains published accounts of the first two, very original and highly successful Polymath projects, one led by Tim Gowers and the other by Terry Tao.

“I don't think I'm easy to talk about. I've got a very irregular head. And I'm not anything that you think I am anyway.”—Syd Barrett’s last interview, Rolling Stone, 1971 Roger Keith “Syd” Barrett (1946–2006) was, by all accounts, the very definition of a golden boy. Blessed with good looks and a natural aptitude for painting and music, he was a charismatic, elfin child beloved by all, who fast became a teenage leader in Cambridge, England, where a burgeoning bohemian scene was flourishing in the early 1960s. Along with three friends and collaborators—Roger Waters, Richard Wright, and Nick Mason—he formed what would soon become Pink Floyd, and rock ’n’ roll was never the same. Starting as a typical British cover band aping approximations of American rhythm ’n’ blues, they soon pioneered an entirely new sound, and British psychedelic rock was born. With early, trippy, Barrett-penned pop hits such as “Arnold Layne” (about a clothesline-thieving cross-dresser) and “See Emily Play” (written specifically for the epochal “Games For May” concert), Pink Floyd, with Syd Barrett as their main creative visionary, captured the zeitgeist of “Swinging” London in all its Technicolor glory. But there was a dark side to all this new-found freedom. Barrett, like so many around him, began ingesting large quantities of a revolutionary new drug, LSD, and his already-fragile mental state—coupled with a personality inherently unsuited to the life of a pop star—began to unravel. The once bright-eyed lad was quickly replaced, seemingly overnight, by a glowering, sinister, dead-eyed shadow of his former self, given to erratic, highly eccentric, reclusive, and sometimes violent behavior. Inevitably sacked from the band, Barrett retreated from London to his mother’s house in Cambridge, where he would remain until his death, only rarely seen or heard, further fueling the mystery. In the meantime, Pink Floyd emerged from the underground to become one of the biggest international rock bands of all time, releasing multi-platinum albums, many that dealt thematically with the loss of their friend Syd Barrett: The Dark Side of the Moon, Wish You Were Here, and The Wall are all, on many levels, about him. In A Very Irregular Head, journalist Rob Chapman lifts the veil of secrecy that has surrounded the legend of Syd Barrett for nearly four decades, drawing on exclusive access to family, friends, archives, journals, letters, and artwork to create the definitive portrait of a brilliant and tragic artist. Besides capturing all the promise of Barrett’s youthful years, Chapman challenges the oft-held notion that Barrett was a hopelessly lost recluse in his later years, and creates a portrait of a true British eccentric who is rightfully placed within a rich literary lineage that stretches through Kenneth Graham, Hilaire Belloc, Edward Lear, Lewis Carroll, John Lennon, David Bowie, and on up to the pioneers of Britpop. A tragic, affectionate, and compelling portrait of a singular artist, A Very Irregular Head will stand as the authoritative word on this very English genius for years to come.

Katharine Cleland's Irregular Unions provides the first sustained literary history of clandestine marriage in early modern England and reveals its controversial nature in the wake of the Elizabethan Religious Settlement, which standardized the marriage ritual for the first time. Cleland examines many examples of clandestine marriage across genres. Discussing such classic works as The Faerie Queene, Othello, and The Merchant of Venice, she argues that early modern authors used clandestine marriage to explore the intersection between the self and the marriage ritual in post-Reformation England. The ways in which authors grappled with the political and social complexities of clandestine marriage, Cleland finds, suggest that these narratives were far more than interesting plot devices or scandalous stories ripped from the headlines. Instead, after the Reformation, fictions of clandestine marriage allowed early modern authors to explore topics of identity formation in new and different ways. Thanks to generous funding from Virginia Tech and its participation in TOME (Toward an Open Monograph Ecosystem), the ebook editions of this book are available as Open Access volumes from Cornell Open (cornellpress.cornell.edu/cornell-open) and other repositories.

A quarterly review of philosophy.

This book, first published in 1951, is an examination of Hume’s ‘Treatise of Human Nature’, ‘An Enquiry Concerning the Principles of Morals’, and ‘An Enquiry Concerning Human Understanding’. It lucidly clarifies and makes alive the new discoveries of Hume’s works in a study that makes plain the importance of this philosopher to the world today.

Originally published: Boston: Houghton Mifflin, 1987.