🚀 go-pugleaf

> |   Lynn Arthur Steen, J.Arthur Seebach,Jr.:
> |   Counterexamples in Topology (second edition),
> |   Springer(1978).

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In article
<TAKANORI.95Nov16124032@clare.ohsaki.meidensha.co.jp> 
takanori@clare.ohsaki.meidensha.co.jp (Takanori Hayashi) writes:

> |   99. Maximal compact topology
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Let X be the set of all lattice points (i,j) of positive
integers together with two ideal points x and y. The
topology on X is defined by declaring each lattice point
to be open, and by taking as open neighborhoods of x sets
of the form X-A where A is any set of lattice points with
at most finitely many points on each row, and as open
neighborhoods of y all sets of the form X-B where B is any
set of lattice points selected from at most finitely many rows.


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      T.Shimura    e-mail:shimura@math.cst.nihon-u.ac.jp