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Prove: x $ y is logically equivalent to .x ! y/ ^ .y ! x/

Mathematics: A Discrete Introduction | 3rd Edition | ISBN: 9780840049421 | Authors: Edward A. Scheinerman ISBN: 9780840049421 447

Solution for problem 7.6 Chapter 7

Mathematics: A Discrete Introduction | 3rd Edition

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Mathematics: A Discrete Introduction | 3rd Edition | ISBN: 9780840049421 | Authors: Edward A. Scheinerman

Mathematics: A Discrete Introduction | 3rd Edition

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Problem 7.6

Prove: x $ y is logically equivalent to .x ! y/ ^ .y ! x/.

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Urban photographers in Europe ▯ Andre Kertesz  Hungarian and known for doing street scenes  Leica camera – popular in photojournalism because you can load film and they were lighter o Resulting photographs: less tonal gradations, more grainy  Did advertisements as well  Didn’t identify as surrealist but looks like Atget (who also didn’t think he was surrealist)  High vantage point is coming form the New Vision  Chromium casings on headlights: in the series “distortion” o Hard to know where one begins and one ends  Polaroids 4 by 3 inches o Did a lot of still life that were abstract o Objects that were important to himself or his wife o All one of a kind  Considered an art photographer now ▯ Brassai  Now considered an art photographer  Started off as a painting student and met Kertesz in Paris  Magnesium that ignited used as a flash (night pictures)  Timed the exposure according to how long it took him to smoke a cigarette  Captured atmospheric effects of light and fog, giving his photos a poetic quality  Compared to Kertez’s Bistro which was also done at night (so Brassai may have gotten idea from him)  Surrealistic quality – seeing different visions at night and someone who walks around at night, Brassai kept with this surrealistic figure of a night wanderer and capturing things that may no

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Chapter 7, Problem 7.6 is Solved
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Textbook: Mathematics: A Discrete Introduction
Edition: 3
Author: Edward A. Scheinerman
ISBN: 9780840049421

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Prove: x $ y is logically equivalent to .x ! y/ ^ .y ! x/