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Space, Time, Matter"The standard treatise on the general theory of relativity." Nature "Whatever the future may bring, Professor Weyl's book will remain a classic of physics." British Journal for Philosophy and Science Reflecting the revolution in scientific and philosophic thought which accompanied the Einstein relativity theories, Dr. Weyl has probed deeply into the notions of space, time, and matter. A rigorous examination of the state of our knowledge of the world
"The standard treatise on the general theory of relativity." -- Nature"Whatever the future may bring, Professor Weyl's book will remain a classic of physics." -- British Journal for Philosophy and Science
Reflecting the revolution in scientific and philosophic thought which accompanied the Einstein relativity theories, Dr. Weyl has probed deeply into the notions of space, time, and matter. A rigorous examination of the state of our knowledge of the world following these developments is undertaken with this guiding principle: that although further scientific thought may take us far beyond our present conception of the world, we may never again return to the previous narrow and restricted scheme.
Although a degree of mathematical sophistication is presupposed, Dr. Weyl develops all the tensor calculus necessary to his exposition. He then proceeds to an analysis of the concept of Euclidean space and the spatial conceptions of Riemann. From this the nature of the amalgamation of space and time is derived. This leads to an exposition and examination of Einstein's general theory of relativity and the concomitant theory of gravitation. A detailed investigation follows devoted to gravitational waves, a rigorous solution of the problem of one body, laws of conservation, and the energy of gravitation. Dr. Weyl's introduction of the concept of tensor-density as a magnitude of quantity (contrasted with tensors which are considered to be magnitudes of intensity) is a major step toward a clearer understanding of the relationships among space, time, and matter.
Binding Type: Paperback
Publisher: Dover Publications
Published: 06/01/1952
ISBN: 9780486602677
Pages: 368
Weight: 0.79lbs
Size: 8.01h x 5.44w x 0.72d
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4.5 ★★★★★
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Product Reviews
★★★★★ 5
Great quality, no holes or fading!
Size: Medium, Color: Black/Assorted
I purchased these socks a couple years ago and love them so much that I just recently purchased them again! They fit perfectly, don't make my feet sweaty, and hit the ankle at the right spot. The material is so good that over years they have not faded and even though I wear the same few pairs every day, they have no signs of thinning or holes! These are the ONLY socks that I buy. I have the black ones as well as the multi-colored ones. I will never buy another brand or style again!
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Reviewed in the United States on January 11, 2020
★★★★★ 5
Cute under armor socks
Size: Medium, Color: Black/Assorted
There's no show under armour socks.Are perfect for anybody who likes thinner socks. I loved them, I love the design the colors and the comfort and fit. Hylie recommend to those of you who like thinner socks.
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Reviewed in the United States on October 22, 2024
★★★★★ 4
Well made and perform well, a little constricting
Size: Medium, Color: Black Assortment (6-pairs)
These socks definitely keep most of the moisture away from my feet, even in wet conditions, which is why I bought them. I am diabetic, though, and the recommendation is to wear socks that don't constrict at any point. These have a tight band around the opening that while it is not uncomfortable on, leaves a mark when I take them off. So far it's been ok, but if you have any kind of swelling in your feet or ankles these would probably not be the best. My foot measures size 8 and I wear size 9 Brooks running shoes. The socks fit me just right but based on the size of the opening and the overall length, I wouldn't think they would fit anyone more than a size larger. Overall well made and perform well as you would expect from this brand.
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Reviewed in the United States on July 20, 2018
★★★★★ 5
long lasting!
Size: Medium, Color: Black/Assorted
literally my favorite sock i will buy forever. they just started busting through after 6 years and i wear them a lot
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Reviewed in the United States on November 13, 2025
★★★★★ 5
Good quality
Size: Medium, Color: Black/Assorted
Comfy and sturdy
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Reviewed in the United States on January 27, 2025