# errata and more: “On the trigenus of Surface Bundles over S^1”

**coming now…**

… details about the errors, flaws, lies, successes, hopes, dreams, desire, aims, goals, joy… about the paper:

“ON THE TRIGENUS OF SURFACE BUNDLES OVER THE ”

now available at tri-genus of surface bundles

- in the abstract i asserted that the seven periodic bundles over have tri-genera ,… recent investigations indicate that some of them have , this happens for the hyper-elliptic involution Zumbeispiel.
- –

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what aren’t errata, are:

- an intensive and exhaustive use of the abstract kernel of an exact sequence of groups , this, give the possible extensions of by …

- A complete topological description of the four (nonorientable 3-manifolds) -bundles over the one-sphere:

fundamental group,

holomogy,

Heegaard genus,

Seifert fibration invariants,

Bockstein’s morphism of their ,

tri-genus…

- a list of four group automorphisms of in terms of Dehn’s twists, at
*… Schematical remarks on the presentations of* * …*

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Suppose that for some autohomeomorphism and for an orientable 3-manifold with a 2-torus boundary: at a section of the Mayer-Vietoris sequence, we have:

which reduces to

(cuz for each non orientable 3-manifold), then which contradicts is orientable… What?

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в конце приводится четыре разных копредставления группы GL(2,Z), со ссылками на первоисточники, и даются явные изоморфизмы между ними.

(at the end provides four different presentation of a group GL (2, Z), with links to primary sources, and give explicit isomorphisms between them.)

read at the bottom of http://mathreader.livejournal.com/or direct http://mathreader.livejournal.com/26482.html