null homotopic - definitie. Wat is null homotopic
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Wat (wie) is null homotopic - definitie

CONTINUOUS DEFORMATION BETWEEN TWO CONTINUOUS MAPS
Homotopic; Homotopy equivalent; Homotopy equivalence; Homotopy invariant; Homotopy class; Null-homotopic; Homotopy type; Nullhomotopic; Homotopy invariance; Homotopy of maps; Homotopically equivalent; Homotopic maps; Homotopy of paths; Homotopical; Homotopy classes; Null-homotopy; Null homotopy; Nullhomotopic map; Null homotopic; Relative homotopy; Homotopy retract; Continuous deformation; Relative homotopy class; Homotopy-equivalent; Homotopy extension and lifting property; Isotopy (topology); Homotopies
  • paths]] shown above are homotopic relative to their endpoints. The animation represents one possible homotopy.
  • isotopy]].

Null allele         
NONFUNCTIONAL ALLELE (A VARIANT OF A GENE) CAUSED BY A GENETIC MUTATION
Null mutation; Null Allele; Null alleles; Null mutant
A null allele is a nonfunctional allele (a variant of a gene) caused by a genetic mutation. Such mutations can cause a complete lack of production of the associated gene product or a product that does not function properly; in either case, the allele may be considered nonfunctional.
Null (SQL)         
  • omega (ω)]] character is used to represent Null in [[database theory]].
  • outer join]] query with Null placeholders in the result set.  The Null markers are represented by the word <code>NULL</code> in place of data in the results.  Results are from [[Microsoft SQL Server]], as shown in SQL Server Management Studio.
SPECIAL MARKER AND KEYWORD IN SQL INDICATING THAT SOMETHING HAS NO VALUE
Sql null; NULL (SQL); NVL; NULLIF; SQL CASE; Sql case; Codd tables; Codd table; COALESCE; C-table; Uncertain database; NULL marks; Null (database)
In SQL, null or NULL is a special marker used to indicate that a data value does not exist in the database. Introduced by the creator of the relational database model, E.
/dev/null         
SPECIAL COMPUTER FILE THAT DISCARDS ALL WRITES
Dev/null; /dev/null/; NUL:; The null device; NUL (computer); NUL (Computer); Dev-null; \Device\Null; /dev/null; Unix null device; \DEV\NUL; /DEV/NUL; NIL:; $null; DD DUMMY; VMS NL:; NUL (device)
/dev-nuhl/ [The Unix null device, used as a data sink] A notional "black hole" in any information space being discussed, used, or referred to. A controversial posting, for example, might end "Kudos to rasputin@kremlin.org, flames to /dev/null". See bit bucket. [Jargon File]

Wikipedia

Homotopy

In topology, a branch of mathematics, two continuous functions from one topological space to another are called homotopic (from Ancient Greek: ὁμός homós "same, similar" and τόπος tópos "place") if one can be "continuously deformed" into the other, such a deformation being called a homotopy (, hə-MO-tə-pee; , HOH-moh-toh-pee) between the two functions. A notable use of homotopy is the definition of homotopy groups and cohomotopy groups, important invariants in algebraic topology.

In practice, there are technical difficulties in using homotopies with certain spaces. Algebraic topologists work with compactly generated spaces, CW complexes, or spectra.