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Post Closed as "Needs details or clarity" by John Rennie, Kyle Kanos, BioPhysicist, user191954, M. Enns
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Qmechanic
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what What is the difference between space like-like four momentum-momentum and time like-like four momentum-momentum?

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Kritika
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what is the difference between space like four momentum and time like four momentum?

I was reading a wiki page on Tachyon, came across these terms? What i need is bit of a mathematical description to understand these terms?