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Nest
A nest is normally built by birds to hold their eggs and provide a home for their offspring. They are usually made of some organic material such as twigs, grass, and leaves.
Generally each species of bird has a distinctive style of nest. Nests can be found in many different habitats . Some birds will build them in trees, some (such as eagles , and many seabirds like kittiwakes) will build them on rocky ledges, and some will build them on the ground.
Common nest types:
Ground nests
Platform nests
Cavity nests
Cupped nests
animals , including squirrels, build nests as well.
functional analysis , a nest is a chain of subspaces of a vector space closed under intersection and union . The algebra of those operatorss leaving invariant every subspace in a nest is called the nest algebra block upper-triangular matrices .
See also
Furniture such as tables and chairs may be called "nesting " if one fits inside or on top of the other.
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