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Rational double points on Enriques surfaces

Paper: pdf

Explanation of the data: pdf

The computational data:
discADE.txt
EmbsList.txt
Embs.txt
GramADE.txt
GramL10.txt
PhisList.txt
Phis.txt
SigmasList.txt
Sigmas.txt
Table.txt

zipped file of the folder RDPEnriquesFolder (1.1MB)


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A note on Mirand-Morrison theory. pdf

This note presents a simple part of the computations for the connected components of the moduli of elliptic K3 surfaces.


On an Enriques surface associated with a quartic Hessian surface

Paper: pdf

Explanation of the data: pdf

The computational data: zipped text (36MB) : zipped folder (37MB)


Connected components of the moduli of elliptic K3 surfaces

Paper: pdf

Explanation of the data: pdf

The computational data: text

A note on Mirand-Morrison theory (a simple part of the computation): pdf


On a smooth quartic surface containing 56 lines which is isomorphic as a K3 surface to the Fermat quartic

Paper: pdf

Explanation of the data: pdf

The computational data: text


Automorphisms of supersingular K3 surfaces and Salem polynomials

Paper: Automorphisms of supersingular K3 surfaces and Salem polynomials pdf

Explanation of the data: pdf

The computational data:
compdataIS0.txt datas for p<100 (18 MB)
sigma10IS17.txt datas for 17000< p<=17389 and sigma=10 (2.6 MB)
compdataIS.zip zip file (148.2 MB)


An algorithm to compute automorphism groups of K3 surfaces and an application to singular K3 surfaces

Paper: pdf

Automorphism groups of complex elliptic K3 surfaces with Picard number 3 (27 pages. This is an extended version of Section 9 of the paper.) pdf .

Automorphism groups of three singular K3 surfaces: Explanation of the data. pdf

T_X=[[2,1],[1,6]] disc11.txt (48 MB)
T_X=[[4,1],[1,4]] disc15.txt (83 MB)
T_X=[[2,0],[0,8]] disc16.txt (201 MB)

The zip file of the three above zip (32 MB)


The automorphism groups of certain singular K3 surfaces and an Enriques surface

Paper: pdf

The automorphism groups of certain singular K3 surfaces and an Enriques surface: computational data. pdf

GramS.txt
ample.txt
AutXa.txt
walls.txt
Invols.txt
EnriquesInvol.txt
NonSympOrder4.txt
hrhodata.txt
SympInvol14.txt
hsigmadata.txt
threeinvols_AutXa.txt
adjacentAutX.txt
Isom.txt
GramL.txt
w0.txt
EmbS.txt
EmbR.txt
EmbZ.txt
GramSZ.txt
prZMat.txt
gensAutZ.txt
DZ0.txt

The zip file zip (0.8MB)


Dynkin diagrams of rank 20 on supersingular K3 surfaces (joint work with De Qi Zhang)

The complete list of R-supersingular K3 primes for Dynkin diagrams R of rank 20.

Download of the data:

Paper: pdf (Explanation of the algorithm and the table of the list typeset by TeX. 45 pages)

List: txt (The table of R-supersingular K3 primes in Maple format)


On the supersingular K3 surface in characteristic 5 with Artin invariant 1 (joint work with T. Katsura and S. Kondo)

Paper: pdf

Explanation of the data: "Supersingular K3 surface in characteristic 5: computational data" pdf

compdataB: txt (file size: 2.4 KB)
compdataChams: txt (file size: 7.8 MB)
compdataKm: txt (file size: 1.6 KB)


Autmorphism group of a supersingular K3 surface (the Fermat quartic surface) in characteristic 3 (joint work with S. Kondo)

We present a finite set of generators of the autmorphism group of a supersingular K3 surface with Arin invariant 1 in characteristic 3.

Paper: pdf

Explanation of the data: Computational data of the paper "The automorphism group of a supersingular K3 surface with Artin variant 1 in characteristic 3" pdf

compdataAutFQChar3: txt (file size: 1.1 MB)
FQprojaut: txt (file size: 636 MB)
FQprojautS: txt (file size: 870 MB)
FQprojautfolder.tar.gz: tar.gz of the two files above (file size: 274 MB)


Elliptic K3 surfaces (old version)

The list of pairs of the ADE-type of singular fibers and the torsion of Modell-Weil groups of complex elliptic K3 surfaces

Download of the data:

Paper: pdf (Explanation of the algorithm. Certain properties of the list are also presented.)

Table: pdf (The table of the list typeset by TeX. 36 pages.)

List: text (The list of all 3693 pairs in plain text format.)


Rational double points on supersingular K3 surfaces

The complete list of configurations of rational double points with the total Milnor number 21 on supersingular K3 surfaces is given.
We also presents the complete list of extremal (quasi-)elliptic fibrations on supersingular K3 surfaces.

Download of the data:

Paper: pdf (Explanation of the algorithm and the table of the list typeset by TeX. 31 pages)

List: RDP.txt (The list of geometrically realizable RDP triples in Maple format)

List: Elliptic.txt (The list of geometrically realizable elliptic triples in Maple format)


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