Undergrad Einstein's General Relativity w/o Cosmological Constant

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General relativity without the cosmological constant is simply referred to as the Einstein Field Equation. This formulation occurs when the cosmological constant term is set to zero or integrated into the stress-energy tensor. The discussion emphasizes that removing the cosmological constant does not alter the fundamental nature of the equations. The focus remains on the relationship between spacetime geometry and matter-energy content. Thus, the essence of general relativity is preserved even without the cosmological constant.
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I mean, what's "general relativity but without the cosmological constant term" (##G_{\mu \nu}=\kappa T_{\mu \nu}##) called?
 
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The Einstein Field Equation. All you've done is set ##\Lambda=0## or subsume the term into the stress-energy tensor.
 
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In an inertial frame of reference (IFR), there are two fixed points, A and B, which share an entangled state $$ \frac{1}{\sqrt{2}}(|0>_A|1>_B+|1>_A|0>_B) $$ At point A, a measurement is made. The state then collapses to $$ |a>_A|b>_B, \{a,b\}=\{0,1\} $$ We assume that A has the state ##|a>_A## and B has ##|b>_B## simultaneously, i.e., when their synchronized clocks both read time T However, in other inertial frames, due to the relativity of simultaneity, the moment when B has ##|b>_B##...

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