Equation 28 · Part 1 · The Valley of Stability Is a Fitness Landscape
Symbol delta
What this part means
delta 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
delta 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 delta→Article meaning
The passage around this formula
where , , and collect the volume, surface, Coulomb, and asymmetry contributions and the pairing term shifts the curve up or down depending on whether N and Z are both even or both odd. For odd A , exactly one of N , Z is even and the pairing term vanishes, giving a single parabola with one minimum: one value of Z at that mass number is the most tightly bound, and every other isobar…
Learn the underlying idea
A function assigns an output to each allowed input. The expression f(x) means “apply f to x”.
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Sources cited in the surrounding passage
These citations provide research context; check each source for the exact claim it supports.