Keisler's Elementary Calculus: An Infinitesimal Approach defines continuity on page 125 in terms of infinitesimals, to the exclusion of epsilon, delta methods. The derivative is defined on page 45 ...

The maker of a homeopathic nasal spray with a history of contamination is refusing to recall its product after the Food and ...

Homeopathy is an alternative medical practice involving the oral or topical use of highly diluted substances, which practitioners believe can stimulate the body to heal itself. Homeopathy does not ...

Earlier this month the Mathematics Institute at Uppsala University hosted a conference called Categorification in Algebra and Topology, clearly a theme close to our collective heart. As yet there are ...

A focus on wellness, personalized treatments and clean ingredients has fueled interest in homeopathic products. Homeopathic preparations are made through repeated dilution. Homeopathic products start ...

Consumers should stop using SnoreStop, FDA says.

1940年，加拿大科幻作家A·E·范·沃格特发表了《野兽之穹（Vault of the Beast）》一书，在书中，一个星际怪物被关在“一个由终极金属构成的穹窿里，门上装有一个时间锁，锁上的一串‘ei’与终极质数相关。” 大家都知道，没有所谓的终极质数（最大质数 ...