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Glossary
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For the description of the underlying principles concerning HyperView
I introduced some terms in order to simplify notation; also, some
readers might not be entirely used to the mathematical terms involved,
which is why I decided to provide a short description for most of them
and maybe a link (indicated by an arrow) to more detailed
explanations. It is by no means meant to be complete (especially not
at the moment, while the page is still under development). However, if
you feel something is missing, write me a
mail, so that I can correct it. Terms that I invented are marked
as "non-official"
2-circle
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Non-official term. I use it to refer to any circle on
S2, obtained for example
as the intersection of S2
with a plane.
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3-circle
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Non-official term. 4-dimensional counterpart to a 2-circle, i.e. any
circle on S3
(intersection of S3
with a plane).
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Hopf map
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A continuous surjective map from
S3 to
S2. It is used to partition the hypersphere into
subsets (see → here)
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hypersphere
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An informal name for
S3
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S2
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The ordinary 3-dimensional unit sphere.
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S3
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The 4-dimensional unit sphere.
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stereographic projection
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A bijective map from any kind of sphere (minus one point, to be precise) in Rn
to Rn-1. In our case 4-dimensional stereographic projection is needed
which is explained → here
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