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I have a friend who is a mathematician but a puzzler at the same time.

Whenever I call him and ask him what he is doing, he gives an awkward answer,

Like when he was working on vectors , he told me "I am figuring out directions to my way home."

when he was working on 3-D,he said "I am sorting my workspace."

Yesterday when I called him, he said "I am fixing ceiling and roof of my house."

What is he working on?

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  • $\begingroup$ Why mathematics tag was not applied to this? $\endgroup$ – Mea Culpa Nay Nov 23 '17 at 15:56
  • $\begingroup$ @MeaCulpaNay because I forgot to :p $\endgroup$ – prog_SAHIL Nov 23 '17 at 16:12
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Maybe it is :

Number Theory

Because

We have Roof function(Ceiling or least integer function)
(floor and ceiling are introduced in number theory).

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Maybe he is:

fixing his ceiling and roof of his house?

Because of what he said on the phone

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