. . Nothing less than a major contribution to the scientific culture of this world." — The New York Times Book ReviewThis major survey of mathematics, featuring the work of 18 outstanding Russian mathematicians and including material on both elementary and advanced levels, encompasses 20 prime subject areas in mathematics in terms of their simple origins and their subsequent sophisticated developement. As Professor Morris Kline of New York University noted, "This unique work presents the amazing panorama of mathematics proper. It is the best answer in print to what mathematics contains both on the elementary and advanced levels."Beginning with an overview and analysis of mathematics, the first of three major divisions of the book progresses to an exploration of analytic geometry, algebra, and ordinary differential equations. The second part introduces partial differential equations, along with theories of curves and surfaces, the calculus of variations, and functions of a complex variable. It furthur examines prime numbers, the theory of probability, approximations, and the role of computers in mathematics. The theory of functions of a real variable opens the final section, followed by discussions of linear algebra and nonEuclidian geometry, topology, functional analysis, and groups and other algebraic systems.Thorough, coherent explanations of each topic are further augumented by numerous illustrative figures, and every chapter concludes with a suggested reading list. Formerly issued as a three-volume set, this mathematical masterpiece is now available in a convenient and modestly priced one-volume edition, perfect for study or reference."This is a masterful English translation of a stupendous and formidable mathematical masterpiece . . ." — Social Science

    When one young penguin realizes his hair is all the wrong colors, how far will he go to stop the stares?Spike the Penguin wishes he wasn’t different. Even though his parents tell him his bright red, orange, yellow, green, blue, and purple mohawk is beautiful, he still wants to hide his head under his flippers. Determined to find a way to be like everyone else, the sad little guy sets out on an Antarctic adventure!Diving deep into the ocean to seek a solution, Spike tries out seashell hats, squid-ink dye jobs, and a seal hair salon. But when no one can make him look just right, he fears he’ll never be happy… until his friends share something unexpected.Can this little penguin learn to appreciate his perfectly awesome plumage?Spike, The Penguin With Rainbow Hair is a heartwarming children’s picture book written in playful rhyme that shares a great message about self acceptance.

    But when I end up in lockdown with my insanely hot billionaire boss, I start to think maybe I can make the best of a bad situation... Heartbreak is never easy. Even breaking up with someone you were never really meant to be with can be painful.I thought Dennis and I would end up married one day.But instead he dumps me at a sushi restaurant.I try to stay positive, and appreciate the ups of being newly single. But then this whole stupid pandemic comes along, and more than anything I hate spending so much time on my own.I'm getting restless, when one day I strike up an interesting conversation with my boss.He's a hot tech industry billionaire, who I find out is recently single as well since the start of the pandemic. After a few days texting back and forth, the two of us come up with a tantalizing arrangement to help us survive through lockdown... Soon my wildest dreams have all come true. I'm making love with my boss in the lap of his luxurious penthouse, and living a life of grandeur unlike anything I've ever imagined for myself. Only I'm about to find, emotions can get in the way of even the sweetest affairs.And now I'm wondering whether these new feelings I'm experiencing can possibly survive through the end of the pandemic...