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Description
The Rules of Algebra: (ars Magna)This cornerstone in the history of mathematics first appeared in 1545 as Artis magnae, sive de regulis algebraicis. A primer on "the great art" of algebra, it contains the first revelation of the principles for solving cubic and biquadratic equations, along with other innovations. Author Girolamo Cardano (1501 76) was famous not only for his prodigious gifts as a mathematician, but also for his skills as a physician, astrologer, and gambler. Cardano's
This cornerstone in the history of mathematics first appeared in 1545 as Artis magnae, sive de regulis algebraicis. A primer on "the great art" of algebra, it contains the first revelation of the principles for solving cubic and biquadratic equations, along with other innovations. Author Girolamo Cardano (1501-76) was famous not only for his prodigious gifts as a mathematician, but also for his skills as a physician, astrologer, and gambler. Cardano's novel approach to the treatment of scientific problems reflects the spirit of his era, the zenith of the Italian Renaissance.Long unavailable, except in rare Latin editions, Cardano's masterpiece is newly accessible in this excellent English translation by T. Richard Witmer. Adapted to modern mathematical syntax, it will appeal to both historians and mathematicians. Oystein Ore, a renowned mathematician and historian of science, provides an informative introduction, and the text is complemented by 26 black-and-white illustrations.
Binding Type: Paperback
Publisher: Dover Publications
Published: 04/19/2007
ISBN: 9780486458731
Pages: 267
Weight: 0.66lbs
Size: 8.42h x 5.36w x 0.58d
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★★★★★ 5
Love it
My face was so dry it burned when I put my regular moisturizer on it so I got this to help. Within a few days my skin felt amazing, smooth, and not dry. It’s not thick and layers nicely if you want to. Love this stuff!
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Reviewed in the United States on May 15, 2026
★★★★★ 5
Effective and Moisturizing
I have rosacea and it’s a constant battle keeping it at bay. Although I have oily skin I have treated patches on my face that get very dry. I was using a product to alleviate dryness that my dermatologist sells which was ridiculously pricey. I finished that product which was effective but genuinely felt I could find similar but less costly. This is it. It is not at all like Vaseline. It’s a less viscous substance and goes on like a facial primer. You only need a little for it to be effective. I use less than a pea size amount rub it between two fingers and dot more on the dry patches and the remaining on the rest of my face in the evening. My skin is so soft in the morning and feels hydrated and smooth. Even after I’ve washed my face it still feels soft. I don’t use it in the morning but noticed my foundation no longer highlights the nasty dry patches I used to have. Lately my rosacea is better controlled so for first time in a while I’m feeling less stressed about my complexion. It’s a good product, I even place a dot of moisturizer on my elbows and heels, it’s incredibly effective. Try it, your face and body will benefit.
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Reviewed in the United States on September 2, 2024
★★★★★ 3
Caution for eczema skin
While this didn’t work for me, I wish it did - the texture was really nice, it wasn’t overly thick but spread easily on my face. I could feel that it was moisturizing and great for winter.
Unfortunately I have eczema on my face and it really flared bad after using this product. I don’t know that this is to blame but for my own wellness, I stopped using
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Reviewed in the United States on March 24, 2025
★★★★★ 5
Good for skin barrier.
Lightweight and non-irritating for skin with rosacea. Good for restoring the skin barrier.
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Reviewed in the United States on April 27, 2026
★★★★★ 5
Perfect simple minimalistic
Light, simple moisturizer. I love it!
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Reviewed in the United States on May 9, 2026