Hi I an studying for the midterm and I would like to know if I got these questions correct.

$\left\lfloor 1.9 \right\rfloor$ - I said that it was an onto function.

2.Find the value of $\left\lceil -1.9 \right\rceil$. In general, is this operation (ceiling) bijective?

$\left\lceil -1.9 \right\rceil$ - I said this one was also an onto function.

Thank you.

  • 5
    $\begingroup$ If you say what is considered the codomain, we could answer to this question. $\endgroup$ – Bernard Feb 28 '16 at 1:49
  • $\begingroup$ Check your definitions against the functions. $\endgroup$ – vonbrand Feb 28 '16 at 2:32
  • $\begingroup$ The function was $F:$ R $ \rightarrow$ Z $\endgroup$ – Jason Thapa Feb 28 '16 at 3:30

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