Formulae involving ∇ Vector Identities with Proofs: Nabla Formulae for Vector Analysis 李国华 (Kok-Wah LEE) @ 08 May 2009 (Version ) No. 4, Jalan Bukit Beruang 5, Taman Bukit Beruang, 75450 Bukit Beruang, Melaka, Malaysia. Email: contact@; E96LKW@ Tel.: +6013-6134998; +606-2312594; +605-4664998 All rights reserved. Vector: Scalar: Nabla: