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A stack or sea stack is a geological landform consisting of a steep and often vertical column or columns of rock in the sea near a coast, formed by wave erosion. [1] Stacks are formed over time by wind and water, processes of coastal geomorphology. [ 2 ]
The name stack is an analogy to a set of physical items stacked one atop another, such as a stack of plates. The order in which an element added to or removed from a stack is described as last in, first out, referred to by the acronym LIFO.
Some parks use deliberate arrangements of rocks as navigational guides to hikers, with the Gorham Mountain trail at Acadia National Park using markers of a flat rock on two "legs" with another rock on top pointing in the direction of the trail, for the benefit of those who have lost their way. Hobbyists stacking rocks in the wilderness risk ...
A cairn is a human-made pile (or stack) of stones raised for a purpose, usually as a marker or as a burial mound. The word cairn comes from the Scottish Gaelic: càrn [ˈkʰaːrˠn̪ˠ] (plural càirn [ˈkʰaːrˠɲ]). [1] Cairns have been and are used for a broad variety of purposes.
The name Matryoshka, is a diminutive form of Matryosha (Матрёша), in turn a hypocoristic of the Russian female first name Matryona (Матрёна). [ 2 ] A set of matryoshkas consists of a wooden figure, which separates at the middle, top from bottom, to reveal a smaller figure of the same sort inside, which has, in turn, another figure ...
This type of stack is also known as an execution stack, program stack, control stack, run-time stack, or machine stack, and is often shortened to simply the "stack". Although maintenance of the call stack is important for the proper functioning of most software , the details are normally hidden and automatic in high-level programming languages .
The word 'stack' is derived from the Old Norse: stakk-r and is often rendered in the Norn of Shetland as stakk [10] and in modern Gaelic as stac or the plural stacan. [11] Several descriptive names are used in more than one location. Examples include: Gaada Stack, meaning "hole stack" and used to describe stacks that incorporate natural arches ...
A stack is called a stack in groupoids or a (2,1)-sheaf if it is also fibered in groupoids, meaning that its fibers (the inverse images of objects of C) are groupoids. Some authors use the word "stack" to refer to the more restrictive notion of a stack in groupoids.