Equation 1 · Part 4 · The Longest Childhood: Life-History Theory and the Grandmother Bet
Symbol A
What this part means
a taxon-specific growth constant.
Its job in the formula
A is an input to the expression that computes the quantity on the left.
Full expression→Symbol A→Article meaning
Where the article explains it
where w is body weight and A is a taxon-specific growth constant; most mammals run at a constant of about 1, but “the mean primate value for A is about 0.4” [ 3 ] .
The passage around this formula
Put the three numbers next to each other and the puzzle sharpens rather than resolving. A species that weans early is, on the usual mammalian logic, moving resources toward producing more offspring faster. A species that delays first reproduction by five years relative to a close comparator is, on the same logic, moving resources the other way, into growth and skill before any output.…
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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Sources cited in the surrounding passage
These citations provide research context; check each source for the exact claim it supports.