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1) "Curved" -- As to curved stairs 2curve
Function: verb
Inflected Form(s): curved; curv·ing
Etymology: Latin curvare, from curvus
intransitive verb : to have or take a turn, change, or deviation from a straight line or plane surface without sharp breaks or angularity
transitive verb
1 : to cause to curve
2 : to throw a curveball to (a batter)
3 : to grade (as an examination) on a curve Pronunciation Symbols
In mathematics, the concept of a curve tries to capture the intuitive idea of a geometrical one-dimensional and continuous object. A simple example is the circle. In everyday use of the term "curve", a straight line is not curved, but in mathematical parlance curves include straight lines and line segments. A large number of other curves have been studied in geometry. This article is about the general theory. The term curve is also used in ways making it almost synonymous with mathematical function (as in learning curve), or graph of a function (Phillips curve). - 1 Definitions
- 2 Conventions and terminology
- 3 Lengths of curves
- 4 Differential geometry
- 5 Algebraic curve
- 6 History
- 7 See also
- 8 References
| In mathematics, a (topological) curve is defined as follows. Let I be an interval of real numbers (i.e. a non-empty connected subset of ). Then a curve is a continuous mapping , where X is a topological space. The curve is said to be simple if it is injective, i.e. if for all x, y in I, we have . If I is a closed bounded interval , we also allow the possibility (this convention makes it possible to talk about closed simple curve). If γ(x) = γ(y) for some (other than the extremities of I), then γ(x) is called a double (or: multiple) point of the curve. A curve is said to be closed or a loop if and if . A closed curve is thus a continuous mapping of the circle S1; a simple closed curve is also called a Jordan curve. A plane curve is a..."
2) "Stairs" -- As to curved stairs stair
Pronunciation: 'ster
Function: noun
Etymology: Middle English steir, from Old English st[AE]ger; akin to Old English & Old High German stIgan to rise, Greek steichein to walk
1 : a series of steps or flights of steps for passing from one level to another -- often used in plural but sing. or plural in constr. <a narrow private stairs -- Lewis Mumford>
2 : a single step of a stairway Pronunciation Symbols
Spiral (double helix) stairway in the Vatican Museum Stairs, staircase, stairway, stairwell, and flight of stairs are all names for a construction designed to bridge a large vertical distance by dividing it into smaller vertical distances, called steps. Stairways may be straight, round, or may consist of two or more straight pieces connected at angles. Special stairways include escalators and ladders. Alternatives to stairways are elevators and inclined moving sidewalks. - 1 Components and terminology
- 1.1 Step
- 1.2 The railing system
- 1.3 Other terminology
- 1.4 Measurements
- 2 Ergonomics and Building Code requirements
- 3 Forms
- 3.1 Spiral and helical stairs
- 3.2 Alternating tread stairs
- 4 Stairs In Skateboarding
- 5 Examples of notable stairways
- 6 See also
- 7 References
| A straight stairway with tiled treads, a double railing and two landings. Commuter bottleneck on a staircase in a New York City subway station. The step is composed of the tread and riser. - tread - The part of the step that is stepped on. It is constructed to the same specifications (thickness) as any other flooring. The tread "length" is measured from the outer edge of the step to the vertical "riser" between steps.
- riser - The vertical portion of the step between steps. This may be missing for an "open" stair effect.
- nosing - An edge part of the tread that protrudes from th..."
Further Data On Term for curved stairs
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