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Vor einem Tag · Arithmetic is an elementary branch of mathematics that studies numerical operations like addition, subtraction, multiplication, and division. In a wider sense, it also includes exponentiation, extraction of roots, and taking logarithms . Arithmetic systems can be distinguished based on the type of number they operate on.
Vor 2 Tagen · 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]
Vor 21 Stunden · Werner Weber. Ernst Witt. Amalie Emmy Noether [a] ( US: / ˈnʌtər /, UK: / ˈnɜːtə /; German: [ˈnøːtɐ]; 23 March 1882 – 14 April 1935) was a German mathematician who made many important contributions to abstract algebra. She proved Noether's first and second theorems, which are fundamental in mathematical physics. [4]
Vor 3 Tagen · An ellipse (red) obtained as the intersection of a cone with an inclined plane. In mathematics, an ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant.
Vor 3 Tagen · The Egyptian pharaoh and unifier of Upper and Lower Egypt was carried off and then killed by a hippopotamus. [2] [3] Draco of Athens. c. 620 BC. The Athenian lawmaker was reportedly smothered to death by gifts of cloaks and hats showered upon him by appreciative citizens at a theatre in Aegina, Greece.
Vor 4 Tagen · Lagrange multiplier. In mathematical optimization, the method of Lagrange multipliers is a strategy for finding the local maxima and minima of a function subject to equation constraints (i.e., subject to the condition that one or more equations have to be satisfied exactly by the chosen values of the variables ). [1]
Vor 4 Tagen · 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.
