rel

1. abbreviationmathematicsAbbreviation of relative to.

   The following notations are in common use: H#58;f#92;simeqg (rel A) means that H is a homotopy rel A from f to g....

   1997, Paul Selick, Introduction to Homotopy Theory (Fields Institute Monographs), American Mathematical Society, →ISBN, page 15

   2 more examples

   Since M#95;0 and M#95;1 are cobordant rel boundary and f#95;0,f#95;1 are n-connected, the number #92;delta#58;#61;#92;frac12(#92;mathrm#123;rk#125;H#95;nM#95;0-#92;mathrm#123;rk#125;H#95;nM#95;1) is a nonnnegative integer.

   1994, N[ikita] Netsvetaev, “Diffeomorphism Criteria for Simply Connected Even-Dimensional Manifolds”, in Oleg Viro, editor, Topology of Manifolds and Varieties (Advances in Soviet Mathematics [series] 18), American Mathematical Society, →ISBN, page 237

   Then in n#92;gen', there is a map h#58;Z#92;toZ' such that h#124;A#61;g and gf#92;simeqf'h rel A, so the diagram above is commutative up to homotopy rel A.

   2002, Allen Hatcher, Algebraic Topology, Cambridge, →ISBN, page 355

plural RELs

1. abbreviationinitialismInitialism of Russo-European Laika.
2. abbreviationinitialismoccupational healthInitialism of recommended exposure limit.

1. abbreviationinitialismInitialism of Robert E. Lee.