In this extended abstract we define the notion of lifting of a crossed module in groups with operations and state some properties of this type of liftings. Furthermore for a certain crossed module we give a categorical equivalence between the lifting of crossed modules and internal groupoid actions in groups with operations.

1.
Alemdar
,
N
and
Mucuk
,
O.
,
The liftings of R-modules to covering groupoids
,
Hacet. J. Math. Stat.
41-6
(
2012
)
813
822
.
2.
Baez
,
J.C.
,
Lauda
,
A.D.
,
Higher-dimensional algebra V: 2-groups
,
Theory Appl. Categ.
12
,
423
491
, (
2004
).
3.
Brown
,
R.
,
Topology and Groupoids
,
BookSurge LLC, North Carolina
(
2006
).
4.
Brown
,
R.
,
Higher dimensional group theory. In: Low Dimensional Topology
,
London Math. Soc. Lect. Notes
,
48
, pp.
215
238
.
Cambridge Univ. Press
, (
1982
).
5.
Brown
,
R.
,
Higgins
,
P. J.
and
Sivera
,
R.
,
Nonabelian Algebraic Topology: filtered spaces, crossed complexes, cubical homotopy groupoids
,
European Mathematical Society, Tracts in Mathematics
15
,
2011
.
6.
Brown
,
R.
,
Huebschmann
,
J.
,
Identities among relations. In: Low Dimentional Topology
,
London Math. Soc. Lect. Notes
,
48
, pp.
153
202
.
Cambridge Univ. Press
(
1982
)
7.
Brown
,
R.
,
Spencer
C. B.
,
G-groupoids, crossed modules and the fundamental groupoid of a topological group
,
Proc. Konn. Ned. Akad. v. Wet.
79
,
296
302
, (
1976
).
8.
Datuashvili
,
T.
,
Categorical, homological and homotopical properties of algebraic objects
, Dissertation,
Georgian Academy of Science
,
Tbilisi
(
2006
).
9.
Higgins
,
P.J.
,
Groups with multiple operators
,
Proc. London Math. Soc.
3
(
6
)
366
416
, (
1956
).
10.
Huebschmann
,
J.
,
Crossed n-fold extensions of groups and cohomology
,
Comment. Math. Helvetici
55
,
302
313
, (
1980
).
11.
Loday
,
J.-L.
,
Cohomologie et groupes de Steinberg relatifs
,
J. Algebra
54
,
178
202
, (
1978
).
12.
Lue
,
A.S.T.
,
Cohomology of groups relative to a variety
,
J. Algebra
69
,
155
174
, (
1981
).
13.
Mucuk
,
O.
and
Şahan
,
T.
,
Group-groupoid actions and liftings of crossed modules
,
Georgian Math. Journal
, Doi: .
14.
Mucuk
,
O.
,
Kılıçarslan
,
B.
,
Şahan
T.
,
Alemdar
,
N.
,
Group-groupoids and monodromy groupoids
,
Topology Appl.
158
(
15
),
2034
2042
, (
2011
).
15.
Mucuk
,
O.
,
Şahan
,
T.
,
Alemdar
,
N.
,
Normality and quotients in crossed modules and group-groupoids
,
Appl. Categor. Struct.
23
,
415
428
, (
2015
).
16.
Mucuk
,
O.
,
Coverings and ring-groupoids
,
Georgian Math. Journal
,
5
,
475
482
, (
1998
).
17.
Orzech
,
G.
,
Obstruction theory in algebraic categories I, II
,
J. Pure Appl. Algebra
2
,
287
314
, 315–340, (
1972
).
18.
Porter
,
T.
,
Extensions, crossed modules and internal categories in categories of groups with operations
,
Proc. Edinb. Math. Soc.
30
,
373
381
, (
1987
).
19.
Whitehead
,
J.H.C.
,
Note on a previous paper entitled “On adding relations to homotopy group”
,
Ann. of Math.
47
,
806
810
, (
1946
).
This content is only available via PDF.