26 Feb
2011
26 Feb
'11
10:48 p.m.
Hi Misha,
My own (very unhelpful) diagnosis of the pattern is that, for the mantissa values:
2018.5 should round to 2018 2019.5 should round to 2020
The pattern appears to be "round half to even", which you may read about on Wikipedia: http://en.wikipedia.org/wiki/Rounding#Round_half_to_even --Juan