\startnarrower as \abstract in LaTeX and bottom "layer" as footnote without markers

[Xan <dxpublica@telefonica.net>]

Hi,

I try to duplicate this [http://arxiv.org/abs/0901.1458] article to 
ConTeXt. The original article was written in LaTeX. I have to troubles 
in this "duplication":

- abstract: I "emulate" LaTeX abstract environment with \startnarrower 
... \stopnarrower, as this 
[http://wiki.contextgarden.net/Article_Abstracts] wiki page suggests. 
But I see that the space between lines is much bigger in ConTeXt than 
LaTeX and that if we put $n^2$ for example in abstract, ConTeXt displays 
too big, as a normal text, instead of LaTeX where all is \small sized.

- for the other hand, I want to put a "layer" as a footnote without 
markers. In the original article it begins with "Date: ...". How can I 
achieve that?

- Finally, I want to put my name and title alternatively in the 
headertexts, in odd and even pages. How can I do that?


Anyone could help me?

Thanks a lot,
Xan.

PS: Please CC-me.
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