In geometry, an envelope of a planar family of curves is a curve that is tangent to each member of the family at some point, and these points of tangency...

to hold a letter being sent by post. Envelope may also refer to: Envelope (mathematics), a curve, surface, or higher-dimensional object defined as being...

In physics and engineering, the envelope of an oscillating signal is a smooth curve outlining its extremes. The envelope thus generalizes the concept of...

but less than an accurate calculation or mathematical proof. The defining characteristic of back-of-the-envelope calculations is the use of simplified assumptions...

The two envelopes problem, also known as the exchange paradox, is a paradox in probability theory. It is of special interest in decision theory and for...

of curves Eccentricity (mathematics) Elliptic curve cryptography Envelope (mathematics) Fenchel's theorem Genus (mathematics) Geodesic Geometric genus...

In mathematics and economics, the envelope theorem is a major result about the differentiability properties of the value function of a parameterized optimization...

\,\!} Chandrasekhar equation Chrystal's equation Caustic (mathematics) Envelope (mathematics) Initial value problem Picard–Lindelöf theorem Rozov, N.Kh...

three-dimensional space has a cuboidal envelope. Two pairs of cells project to the upper and lower halves of this envelope, and the four remaining cells project...

FSK, the peak envelope power bears no particular ratio or mathematical relationship to longer-term average power in distorted envelopes, such as a CW...

Bolza surface First Hurwitz triplet Hermite constant Systoles of surfaces Systolic freedom Systolic category Envelope (mathematics) Bäcklund transform...

In mathematics, particularly in algebra, the injective hull (or injective envelope) of a module is both the smallest injective module containing it and...

In mathematics the Karoubi envelope (or Cauchy completion or idempotent completion) of a category C is a classification of the idempotents of C, by means...

proposed by Jean-Jacques Moreau in 1965. The Moreau envelope has important applications in mathematical optimization: minimizing over M f {\displaystyle...

these allow a constant-width channel between them for coolant. Envelope (mathematics) Evolute Goat grazing problem Involute gear Roulette (curve) Scroll...

intersect gives the appearance of Bézier curves (as in the mathematical concept of envelope of a family of straight lines). Quadratic Bézier curve are...

In mathematics, the lower convex envelope f ˘ {\displaystyle {\breve {f}}} of a function f {\displaystyle f} defined on an interval [ a , b ] {\displaystyle...

mathematics, the Morlet wavelet (or Gabor wavelet) is a wavelet composed of a complex exponential (carrier) multiplied by a Gaussian window (envelope)...

Snell envelope, used in stochastics and mathematical finance, is the smallest supermartingale dominating a stochastic process. The Snell envelope is named...

Mathematical optimization (alternatively spelled optimisation) or mathematical programming is the selection of a best element, with regard to some criteria...

In mathematics, the lower envelope or pointwise minimum of a finite set of functions is the pointwise minimum of the functions, the function whose value...

altered by components such as filters, which cut or boost frequencies; envelopes, which control articulation, or how notes begin and end; and low-frequency...

The United States of America Mathematical Olympiad (USAMO) is a highly selective high school mathematics competition held annually in the United States...

In mathematics, the oscillation of a function or a sequence is a number that quantifies how much that sequence or function varies between its extreme...

In category theory and related fields of mathematics, an envelope is a construction that generalizes the operations of "exterior completion", like completion...

defined as the envelope of a line segment of fixed length that moves while keeping an end point on each of the axes. It is therefore the envelope of the moving...

particles in the medium. In mathematics and electronics waves are studied as signals. On the other hand, some waves have envelopes which do not move at all...

Experimental mathematics is an approach to mathematics in which computation is used to investigate mathematical objects and identify properties and patterns...

In geometry, the convex hull, convex envelope or convex closure of a shape is the smallest convex set that contains it. The convex hull may be defined...

In mathematics and signal processing, an analytic signal is a complex-valued function that has no negative frequency components.  The real and imaginary...