<?xml version="1.0" encoding="UTF-8"?> <sfm:png xmlns:sc="http://www.utc.fr/ics/scenari/v3/core" xmlns:sfm="http://www.utc.fr/ics/scenari/v3/filemeta" xmlns:lx="scpf.org:lexicon"> <lx:imgM xmlns:sp="http://www.utc.fr/ics/scenari/v3/primitive"> <sp:alt> <lx:altM> <sp:alt>\nabla^2~f(M)=div[\overrightarrow{grad}~f(M)]</sp:alt> </lx:altM> </sp:alt> </lx:imgM> </sfm:png>