Equation 69 · Part 1 · The Bend an Elevator Cannot Fake
Symbol hatphi
What this part means
hatphi is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Its job in the formula
hatphi is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol hatphi→Article meaning
The passage around this formula
The deeper question the loop-closure argument sets aside is what happens once loop closure has already been confirmed — once a single, well-behaved genuinely fits every edge. Does a nonzero slope in that fitted potential mean anything has curved? The equivalence principle’s oldest thought experiment already answers no, and the answer can be made exact rather than qualitative.
Learn the underlying idea
A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.
Open the illustrated variables: a letter stands for a value guide →
See this notation across published equations →
Sources cited in the article section
These citations provide research context; check each source for the exact claim it supports.