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MassiveLVectorQ

MassiveLVectorQ[x]
returns True if x is interpretable as LVector but not as a massless Spinor. Returns False otherwise.
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Basic Examples   (3)
Arbitrary symbol is not interpreted as massive LVector:
LVector that is not a massless Spinor is interpreted as massive LVector:
Massless spinor is not interpreted as massive LVector:
Arbitrary symbol is not interpreted as massive LVector:
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LVector that is not a massless Spinor is interpreted as massive LVector:
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Massless spinor is not interpreted as massive LVector:
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