s585.py

from research import *
s=begin(585,'Execute the local Tishri/Nisan phase rule','Can one half-year coordinate convention reproduce the source examples?',{'n':'Y','t':'Y−1/2','examples':[[1450,1446],[970,966]]},['File12 §§6.1–6.3; File63 phase controls'])
t=lambda y:F(y)-F(1,2);v=[t(1450)-1446,F(1449)-1446,t(970)-966]
finish(s,{'phase_spans_years':v,'separate_units':['0.5-year calendar phase','3.5-year Aaron/Moses offset','3.5-day liturgical projection']},'The local rule t(Y)=Y−0.5 reproduces3.5,3 and3.5-year examples. Equal printed magnitudes across phase offsets and liturgical days do not supply a unit conversion.','Reduce calendar comparisons to a common normalized measure.',{'examples':v==[F(7,2),3,F(7,2)]})