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partition of unity

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partition of unity [pär′tish·ən əv ′yü·nəd·ē]
(mathematics)
On a topological spaceX,this is a covering by open setsUαwith continuous functions ƒαfromXto [0,1], where each ƒαis zero on all but a finite number of theUα, and the sum of all these ƒαat any point equals 1.


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Abstract We extend Unser's theory of sampling in shift-invariant spaces to the case of a Gaussian generator previously excluded because of violating the partition of unity condition.
Indeed, we can represent [MATHEMATICAL EXPRESSIONS NOT PREPRODUCIBLE ASCII] Here p =[PI]*[lambda] is the pull-back of the Lebesgue measure (possible as 7 is a diffeomorphism onto the interior of P), and [MATHEMATICAL EXPRESSIONS NOT PREPRODUCIBLE ASCII] is the partition of unity such that [phi]F = 0 outside of the small vicinity of the stratum of [P.
A partition of unity argument together with Proposition 1 of [Ste93, Chapter VIII] shows that [a.
 
 
 
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