Module Quad.Box
Boxes of integration, one per lane.
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type ('b, 'd) tThe type for boxes of dtype 'b.
v lo hi is the box with corners lo and hi, which broadcast together to lanes @ [d]: a point's coordinates are the last axis. An axis with hi < lo flips the integral's sign, as Range.v.
Raises Invalid_argument if lo and hi do not broadcast or are scalars.