How Was The Universe Born

Author: Isaac Asimov
Publisher: Gareth Stevens Publishing
ISBN: 9781555323837
Size: 51.91 MB
Format: PDF
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Discusses the origins and characteristics of our universe, focusing on the nature of stars.

Principia Mathematica To 56

Author: Alfred North Whitehead
Publisher: Cambridge University Press
ISBN: 9780521626064
Size: 33.56 MB
Format: PDF, Kindle
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This abridged text of Volume I contains the material that is most relevant to an introductory study of logic and the philosophy of mathematics (more advanced students will of course wish to refer to the complete edition).