About the midpoint of a chord of a circle, through which two other chords are drawn
For the "butterfly lemma" of group theory, see Zassenhaus lemma.
The butterfly theorem is a classical result in Euclidean geometry, which can be stated as follows:[1]: p. 78
Let M be the midpoint of a chord PQ of a circle, through which two other chords AB and CD are drawn; AD and BC intersect chord PQ at X and Y correspondingly. Then M is the midpoint of XY.
^Johnson, Roger A., Advanced Euclidean Geometry, Dover Publ., 2007 (orig. 1929).
The butterflytheorem is a classical result in Euclidean geometry, which can be stated as follows:: p. 78 Let M be the midpoint of a chord PQ of a circle...
through its midpoint also passes through the circle's center. The butterflytheorem states that, if M is the midpoint of a chord PQ of a circle, through...
Brahmagupta's formula Buffon's needle problem Bundle theoremButterflytheorem Carnot's theorem Casey's theorem Circle graph Circle map Circle packing Circle...
theory Angle bisector theoremButterflytheorem Ceva's theorem Heron's formula Menelaus' theorem Nine-point circle Pythagorean theorem Eves 1963, p. 19. Eves...
lemma (also known as the butterfly lemma) is sometimes called the fourth isomorphism theorem. The first isomorphism theorem can be expressed in category...
quadrilateral, then there exists an inscribing circle for this quadrilateral. Butterflytheorem Brahmagupta triangle Cyclic polygon Power of a point Ptolemy's table...
specifically to give the most direct proof of the Schreier refinement theorem. The 'butterfly' becomes apparent when trying to draw the Hasse diagram of the...
conditions hold for v ≥ 3: Theorem 1. e ≤ 3v – 6; Theorem 2. If there are no cycles of length 3, then e ≤ 2v – 4. Theorem 3. f ≤ 2v – 4. In this sense...
posed the previous year by Thomas Scurr (d. 1836), now dubbed the Butterflytheorem. Leaving the headmastership of Kingswood School would have given him...
Klarner ed. (Pridle, Weber & Schmidt, 1981). The Metamorphosis of the ButterflyTheorem, Mathematics Magazine, Mathematical Association of America, October...
loops, repetition, self-similarity, fractals and self-organization. The butterfly effect, an underlying principle of chaos, describes how a small change...
generalized Kolmogorov complexity. Instead of proving similar theorems, such as the basic invariance theorem, for each particular measure, it is possible to easily...
In physics and mathematics, the Helmholtz decomposition theorem or the fundamental theorem of vector calculus states that any sufficiently smooth, rapidly...
solutions to a problem which would later be seen as an example of the butterfly effect. Mary Cartwright was born on 17 December 1900, in Aynho, Northamptonshire...
is isomorphic to the butterfly graph. Friendship graphs are generalized by the triangular cactus graphs. The friendship theorem of Paul Erdős, Alfréd...
\mathbb {Z} ^{2}} ." Their results are termed the "Chayes–McKellar–Winn theorem". Later, when Chayes was asked to comment about the mathematical abilities...
subsets Schur multiplier Semidirect product Sylow theorems Hall subgroup Wreath product Butterfly lemma Center of a group Centralizer and normalizer...
Heawood conjecture (now the Ringel–Youngs theorem), a mathematical problem closely linked with the four color theorem. Although born in Austria, Ringel was...
quadrilateral is called variously a cross-quadrilateral, crossed quadrilateral, butterfly quadrilateral or bow-tie quadrilateral. In a crossed quadrilateral, the...
12, 1995) was an American bass guitar player for the rock group Iron Butterfly and associated groups between 1974 and 1980. He later became a computer...
Alternately, conservative systems are those to which the Poincaré recurrence theorem applies. An important special case of conservative systems are the measure-preserving...