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Employment record book. An employment record book is an official personal document recording the employment status of its owner over time. Some European countries issue such documents, others did earlier. The first employment record books are said to have been issued in German Reich in 1892 in the mining industry. [1]
Zorn's lemma says that a maximal tree must exist, which is a spanning tree since the graph is connected. [1] Zorn's lemma is not needed for finite graphs, such as the one pictured here. Zorn's lemma, also known as the Kuratowski–Zorn lemma, is a proposition of set theory.
B1 Free Archiver is a proprietary freeware multi-platform file archiver and file manager. B1 Archiver is available for Microsoft Windows, Linux, macOS, and Android. It has full support (compression, unpacking and encryption) for ZIP and its native B1 format. [1] The program decompresses more than 20 popular archive formats. [2]
A minimal element of a subset of some preordered set is defined dually as an element of that is not greater than any other element in . The notions of maximal and minimal elements are weaker than those of greatest element and least element which are also known, respectively, as maximum and minimum. The maximum of a subset of a preordered set is ...
The number 2,147,483,647 is the eighth Mersenne prime, equal to 2 31 − 1. It is one of only four known double Mersenne primes. [ 1 ] The primality of this number was proven by Leonhard Euler, who reported the proof in a letter to Daniel Bernoulli written in 1772. [ 2 ] Euler used trial division, improving on Pietro Cataldi 's method, so that ...
The defeat of Nazi Germany in 1945 freed approximately 11 million foreigners (categorized as "displaced persons"), most of whom were forced labourers and POWs. During the war, German forces brought into the Reich 6.5 million civilians, in addition to Soviet POWs, for unfree labour in factories. [1] Returning them home was a high priority for ...
Foxit PDF Reader (formerly Foxit Reader) is a multilingual freemium PDF (Portable Document Format) tool that can create, view, edit, digitally sign, and print PDF files. [3] Foxit Reader is developed by Fuzhou, China-based Foxit Software. Early versions of Foxit Reader were notable for startup performance and small file size. [4]
A continuous function on the closed interval showing the absolute max (red) and the absolute min (blue). In calculus, the extreme value theorem states that if a real-valued function is continuous on the closed and bounded interval , then must attain a maximum and a minimum, each at least once.