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A 'saddle point' in mathematics derives its name from the fact that the prototypical example in two dimensions is a surface that curves up in one direction, and curves down in a different direction, resembling a riding saddle or a mountain pass between two peaks forming a landform saddle.
Saddle point, a point on a surface whose neighborhood resembles a saddle Monkey saddle , a mathematical surface defined by the equation z = x 3 − 3 x y 2 {\displaystyle z=x^{3}-3xy^{2}} Sources and sinks , vectors field in a point that are neither of the two are sometimes called saddles.
This glossary of geography terms is a list of definitions of terms and concepts used in geography and related fields, including Earth science, oceanography, cartography, and human geography, as well as those describing spatial dimension, topographical features, natural resources, and the collection, analysis, and visualization of geographic ...
It may be called a col, notch, pass, saddle, water gap, or wind gap. Geomorphologically, a gap is most often carved by water erosion from a freshet, stream or a river. [1] Gaps created by freshets are often, if not normally, devoid of water through much of the year, their streams being dependent upon the meltwaters of a snow pack.
Mountain range – Geographic area containing several geologically related mountains; Mud volcano – Landform created by the eruption of mud or slurries, water and gases; Mushroom rock – Naturally occurring rock whose shape resembles a mushroom; Natural arch – Arch-shaped natural rock formation; Nunatak – Landform within an ice field or ...
Idealised mountain pass represented as the green line; the saddle point is in red.. Mountain passes make use of a gap, saddle, col or notch.A topographic saddle is analogous to the mathematical concept of a saddle surface, with a saddle point marking the minimum high point between two valleys and the lowest point along a ridge.
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The Langkofel Group in the Dolomites of the Italian Alps, with the clearly visible Langkofel Col (Langkofelscharte) left of centre. A col in geomorphology is the lowest point on a mountain ridge between two peaks. [1]