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Tổng tiền thanh toán:
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In this text, Robert Kaplan explores the peculiar course that the notion of "nothing" or its mathematical representative, zero, has taken throughout history. Forced into our awareness 4000 years ago by the need to count ever larger multitudes, zero drifted in and out of focus, disappeared for centuries, then swept from the East into the medieval world, with fears and superstitions crouched around it. Did we discover or invent it? Was it the devil's work? Is it a number or a fiction? Its users came to see that it held immense power to unriddle the universe, leading to profound insights into the mind and the world. And now new layers are coming to our computers speak only in zeros and ones, and, for a cosmologist, zero alone can be made to generate everything.
We based our evaluation of book condition on the following criteria:
* New: Just like it sounds. A brand-new, unused, unread copy in perfect condition.
* Like New: An apparently unread copy in perfect condition. Dust cover is intact; pages are clean and are not marred by notes or folds of any kind.
* Very Good: A copy that has been read, but remains in excellent condition. Pages are intact and are not marred by notes or highlighting, but may contain a neat previous owner name. The spine remains undamaged.
* Good: A copy that has been read, but remains in clean condition. All pages are intact, and the cover is intact. The spine may show signs of wear. Pages can include limited notes and highlighting, and the copy can include "From the library of" labels or previous owner inscriptions.
* Acceptable: A readable copy. All pages are intact, and the cover is intact (the dust cover may be missing). Pages can include considerable notes--in pen or highlighter--but the notes cannot obscure the text.
