[ntp:questions] Leap second to be introduced in June

David Malone dwmalone at walton.maths.tcd.ie
Tue Jan 27 08:52:49 UTC 2015

Terje Mathisen <terje.mathisen at tmsw.no> writes:

>The derivatives of sine/cosine are of course +/- cosine/sine, so they 
>stay smooth at all levels.

The point is that it is not smooth where it joins on to the regular
passage of time... It is possible to do this in an infinitely smooth
way, but using the cos formula just gives a few continuous derivatives.


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