Equation 34 · Part 1 · The Bend an Elevator Cannot Fake
Symbol y
What this part means
y 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
y 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 y→Article meaning
The passage around this formula
Weighted least squares achieves zero residual on any data that lie exactly in the range of B . If y truly equals B for some vector — meaning a genuine, single-valued scalar potential sits at every node, however violently curved the spacetime that produced it — then itself drives the weighted sum of squares to exactly zero, which is the smallest…
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.
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