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I'm trying to follow a derivation in a paper and this equation is confusing me:

(u'.[tex]\nabla[/tex])U= ([tex]\nabla[/tex]U).u'

Where U and u' are velocities.

The operation of del on the vectorUwithout a dot or cross product is giving me some grief. Can someone explain how this works to me.

Thanks

Sean

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# Del operator

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