Is it possible for ntheorem to number each instance with subscript numbers?

Question

I am wondering if it is possible to alter ntheorem's numbering of theorems/hypotheses/instances with subscript numbers. I could not find anything on this matter in the package's documentation, which has options for arabic, greek, alph, roman and so on, but not regarding subcript numbers.

MWE:

documentclass{article}
usepackage[utf8]{inputenc}
usepackage{ntheorem, fixltx2e, hyperref}
theoremseparator{:}
newtheorem{hyp}{Hypothesis}
begin{document}
Below is my first hypothesis.
begin{hyp}[Href{hyp:h1}] label{hyp:h1}
The apple seldom falls far from the tree.
end{hyp}
Below is my second hypothesis.
begin{hyp}[Href{hyp:h2}] label{hyp:h2}
All swans are white.
end{hyp}
I am interested in the "H label" appearing like so: textbf{Hypothesis 2 (Htextsubscript{2})}.
end{document}

Thank you very much in advance.

egreg · Accepted Answer

Since you seem to want the same number, you don't really need label and ref. It's easier defining a new environment based on a theorem-like one. I also provided a new hypref command for referencing to hypotheses.

documentclass{article}
usepackage[utf8]{inputenc}
usepackage{ntheorem,hyperref}

theoremseparator{:}

newtheorem{hypx}{Hypothesis}
newenvironment{hyp}{hypx[Htextsubscript{thehypx}]}{endhypx}
newcommand{hypref}[1]{textup{(Htextsubscript{ref{#1}})}}

begin{document}

Below is my first hypothesis.

begin{hyp}label{hyp:h1}
The apple seldom falls far from the tree.
end{hyp}

Below is my second hypothesis.

begin{hyp}
All swans are white.
end{hyp}

Here is a reference to hypref{hyp:h1}.

end{document}

Is it possible for ntheorem to number each instance with subscript numbers?

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