Search results
Results from the Tech24 Deals Content Network
Ptolemy's Theorem yields as a corollary a pretty theorem [2] regarding an equilateral triangle inscribed in a circle. Given An equilateral triangle inscribed on a circle and a point on the circle. The distance from the point to the most distant vertex of the triangle is the sum of the distances from the point to the two nearer vertices.
It is uncertain who actually discovered the theorem; however, the oldest extant exposition appears in Spherics by Menelaus. In this book, the plane version of the theorem is used as a lemma to prove a spherical version of the theorem. [8] In Almagest, Ptolemy applies the theorem on a number of problems in spherical astronomy. [9]
All vertices of a regular polygon lie on a common circle (the circumscribed circle); i.e., they are concyclic points. That is, a regular polygon is a cyclic polygon . Together with the property of equal-length sides, this implies that every regular polygon also has an inscribed circle or incircle that is tangent to every side at the midpoint.
Although named for Edgar Buckingham, the π theorem was first proved by the French mathematician Joseph Bertrand [1] in 1878. Bertrand considered only special cases of problems from electrodynamics and heat conduction, but his article contains, in distinct terms, all the basic ideas of the modern proof of the theorem and clearly indicates the theorem's utility for modelling physical phenomena.
Moreover, satisfies the first set of hypotheses in Darboux's theorem, and so locally there is a coordinate chart near in which = + … +. Taking an exterior derivative now shows ω = d θ = d x 1 ∧ d y 1 + … + d x m ∧ d y m . {\displaystyle \omega =\mathrm {d} \theta =\mathrm {d} x_{1}\wedge \mathrm {d} y_{1}+\ldots +\mathrm {d} x_{m ...
It is equivalent to the concept of similar triangles, i.e. it can be used to prove the properties of similar triangles and similar triangles can be used to prove the intercept theorem. By matching identical angles you can always place two similar triangles in one another so that you get the configuration in which the intercept theorem applies ...
In mathematics, Abel's theorem for power series relates a limit of a power series to the sum of its coefficients. It is named after Norwegian mathematician Niels Henrik Abel , who proved it in 1826. [ 1 ]
In differential geometry, the slice theorem states: given a manifold on which a Lie group acts as diffeomorphisms, for any in , the map /, [] extends to an invariant neighborhood of / (viewed as a zero section) in / so that it defines an equivariant diffeomorphism from the neighborhood to its image, which contains the orbit of .