How to make footcite refer to the first footnote when citing identical references?

Question

I am writing a document where I am forced to insert citations of relevant bibliography as footnotes. I am using a similar text for comparison, and I noticed that the bibliography style is rather compact:

As it is shown in [1], $2=1$; compare also [2] for a more
combinatorial proof of this result. 

[...] 

Remember that the main theorem in [1,2] entail that $2=1$; [3] 
aims to apply this result to a statement equivalent to RH (see [4]).

=========
[1]: N. True; "A simple proof of something false" (1989). 
[2]: A. Las; "A difficult proof of something false" (2001).
[3]: T. Kyle; "You could have proved something better than this" (2002).

When referring again to [1], only a superscript with the corresponding footnote where it has been cited the first time is printed. I think this is done with clever cross-referencing and a bit of biblatex magic, but my bib-fu is rather poor, so I'm not able to backward-engineer the pdf to understand how this is done.

I tried by simply juggling with styles in biblatex options, to no avail.

Edit: I produced a MWE:

\documentclass{article}

\usepackage{filecontents,lipsum}
\usepackage[style=verbose-ibid,backend=bibtex]{biblatex}

\begin{filecontents}{\jobname.bib}
@article{ntrue,
  title={A simple proof of something false},
  author={N. True},
  journal={Journal of Pure and Applied Algebra},
  volume={9},
  number={2},
  pages={207--220}
}

@article{alas,
    AUTHOR = {A. Las},
     TITLE = {A difficult proof of something false},
   JOURNAL = {J. Homotopy Relat. Struct.},
    VOLUME = {2},
      YEAR = {2007},
    NUMBER = {2},
     PAGES = {295--314},
   MRCLASS = {18E40 (18D30)},
  MRNUMBER = {2369170 (2008m:18023)}
}

@article{tkyle,
    AUTHOR = {T. Kyle},
     TITLE = {You could have proved something better than this},
   JOURNAL = {Trans. Amer. Math. Soc.},
  FJOURNAL = {Transactions of the American Mathematical Society},
    VOLUME = {353},
      YEAR = {2001}
}
\end{filecontents}
\addbibresource{\jobname.bib}
\begin{document}
As it is shown in [\footcite{ntrue}], $$2=1.$$ compare also [\footcite{alas}] for a more
combinatorial proof of this result. 

\lipsum[3]

Remember that the main theorem in [\footcite{ntrue}, \footcite{alas}] entail that $2=1$; [\footcite{tkyle}] aims to apply this result to a statement equivalent to RH.
\end{document}

I want that the second reference \footcite{ntrue} points to footnote 1. Obviously (if possible) without defining a command which refers to a footnote (this forces me to keep track of each occurrence of each key, and note manually who's the first: it can be done, but...)

I could. But there are reasons cough for which it is better not to do it. — fosco, Jul 26 '15 at 13:08
If it is for a journal submission or particular publisher, they may provide a suitable class or package designed to comply with the guidelines. But if you want help here, you can encourage people by providing a Minimum Working Example which people can play with. — cfr, Jul 26 '15 at 14:07
Please have a look at biblatex : which style for a footnote once then nothing?, Biblatex cite with footnote only once, with use of brackets and Repeat the same reference in footnote on different pages. Depending on whether (and if so, how) you want to interact with normal footnotes, a solution might be easier or more complicated. — moewe, Jul 26 '15 at 14:18
I wonder if the Oscola biblatex package might be doing this? It's the UK's standard legal Citation style, with the first footnote being Smith, Law Book, 2009, Oxford and the subsequent footnote has it Smith (n.1) — ctokelly, Jul 26 '15 at 14:55
@tetrapharmakon This answer addresses the essence of the problem. You can work from there, depending on your styling choices. — Paolo Brasolin, Jul 26 '15 at 16:36
Did any of the links help you? As it stands now, I'm very much inclined to think your question is a duplicate of Repeat the same reference in footnote on different pages. — moewe, Jul 29 '15 at 16:04
This is not a duplicate of that thread, I don't want that the reference be repeated on the second page. I only want a pointer to the first citation, each time I recast it, and anything else — fosco, Aug 02 '15 at 10:17

How to make footcite refer to the first footnote when citing identical references?

0 Answers0