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Hace 1 día · Cryptography, or cryptology (from Ancient Greek: κρυπτός, romanized : kryptós "hidden, secret"; and γράφειν graphein, "to write", or -λογία -logia, "study", respectively [1] ), is the practice and study of techniques for secure communication in the presence of adversarial behavior. [2]
Hace 3 días · Conjugation by a unit quaternion (a quaternion of absolute value 1) with real part cos (φ) is a rotation by an angle 2φ, the axis of the rotation being the direction of the vector part. The advantages of quaternions are: [41] Avoiding gimbal lock, a problem with systems such as Euler angles.
Hace 4 días · Obesity is a medical condition, sometimes considered a disease, [8] [9] [10] in which excess body fat has accumulated to such an extent that it can potentially have negative effects on health. People are classified as obese when their body mass index (BMI)—a person's weight divided by the square of the person's height—is over 30 kg / m 2 ...
Hace 1 día · Beatrice Worsley [4] Signature. Alan Mathison Turing OBE FRS ( / ˈtjʊərɪŋ /; 23 June 1912 – 7 June 1954) was an English mathematician, computer scientist, logician, cryptanalyst, philosopher and theoretical biologist. [5] Turing was highly influential in the development of theoretical computer science, providing a formalisation of the ...
Hace 5 días · Directed set - Wikipedia; Order Theory, Lecture Notes by Mark Dean for Decision Theory; 卢开澄，卢华明，《组合数学》（第 3 版）, 2006; List of Order Theory Topics - Wikipedia; 浅谈邻项交换排序的应用以及需要注意的问题 by ouuan; One thing you should know about comparators—Strict Weak Ordering; Dilworth's ...
Hace 2 días · History (derived from Ancient Greek ἱστορία (historía) 'inquiry; knowledge acquired by investigation') [1] is the systematic study and documentation of the human past. [2] [3] The period of events before the invention of writing systems is considered prehistory. [4] ". History" is an umbrella term comprising past events as well as the ...
Hace 3 días · e. Eugenics ( / juːˈdʒɛnɪks / yoo-JEN-iks; from Ancient Greek εύ̃ (eû) 'good, well', and -γενής (genḗs) 'come into being, growing') [1] is a set of beliefs and practices that aim to improve the genetic quality of a human population. [2] [3] [4] Historically, eugenicists have attempted to alter human gene pools by excluding ...
