# Rec vs Rel - What's the difference?

rec | rel |

is (informal).

## As a verb rec

is (informal) to recommend something such as a book, movie, product etc.

## As a preposition rel is

(mathematics) relative to.

# rec

## English

### Noun

(en noun)
• (informal)
• At 11:00, school’s out, and it’s time for rec
• (informal) A recommendation or suggestion.
• ### Verb

• (informal) To recommend something such as a book, movie, product etc.
• ### Anagrams

* * English clippings ----

# rel

## English

### Preposition

(English prepositions)
• (mathematics) Relative to.
• * 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, [publisher], ISBN 0821841246, page 237,
• Since $M_0$ and $M_1$ are cobordant rel boundary and $f_0, f_1$ are n -connected, the number $\delta:=\frac12\left(\mathrm\left\{rk\right\} H_nM_0-\mathrm\left\{rk\right\}H_nM_1\right)$ is a nonnnegative integer.
• * 1997 , Paul Selick, Introduction to Homotopy Theory , Fields Institute Monographs [series], [publisher], ISBN 0821806904, page 15,
• The following notations are in common use: $H:f\simeq g$ (rel A'') means that ''H'' is a homotopy rel ''A'' from ''f'' to ''g ....
• * 2002 , , Algebraic Topology ], [[w:Cambridge University Press, Cambridge], ISBN 0521795400, page 355,
• Then in $n\ge n\text{'}$, there is a map $h:Z\to Z\text{'}$ such that $h, A=g$ and $gf\simeq f\text{'}h$ rel' ''A'', so the diagram above is commutative up to homotopy '''rel ''A .

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