| Title:
             | 
On the measurability of sets of pairs of intersecting nonisotropic straight lines of type beta in the simply isotropic space (English) | 
| Author:
             | 
Borisov, Adrijan Varbanov | 
| Author:
             | 
Spirova, Margarita Georgieva | 
| Language:
             | 
English | 
| Journal:
             | 
Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica | 
| ISSN:
             | 
0231-9721 | 
| Volume:
             | 
48 | 
| Issue:
             | 
1 | 
| Year:
             | 
2009 | 
| Pages:
             | 
7-16 | 
| Summary lang:
             | 
English | 
| . | 
| Category:
             | 
math | 
| . | 
| Summary:
             | 
The measurable sets of pairs of intersecting non-isotropic straight lines of type $\beta $ and the corresponding densities with respect to the group of general similitudes and some its subgroups are described. Also some Crofton-type formulas are presented. (English) | 
| Keyword:
             | 
Simply isotropic space | 
| Keyword:
             | 
density | 
| Keyword:
             | 
measurability | 
| MSC:
             | 
28A75 | 
| MSC:
             | 
52A22 | 
| MSC:
             | 
53C65 | 
| idZBL:
             | 
Zbl 1203.53072 | 
| idMR:
             | 
MR2641943 | 
| . | 
| Date available:
             | 
2010-02-11T13:47:30Z | 
| Last updated:
             | 
2012-05-04 | 
| Stable URL:
             | 
http://hdl.handle.net/10338.dmlcz/137502 | 
| . | 
| Reference:
             | 
[1] Borisov, A.: Integral geometry in the Galilean plane.Research work qualifying for a degree full-professor, Sofia, 1998. | 
| Reference:
             | 
[2] Borisov, A. V., Spirova, M. G.: Crofton-type formulas relating sets of pairs of intersecting nonisotropic straight lines in the simply isotropic space.Tensor 67 (2006), 243–253. MR 2361199 | 
| Reference:
             | 
[3] Deltheil, R.: Sur la théorie des probabilité géométriques.Thése Ann. Fac. Sc. Univ. Toulouse 11 (1919), 1–65. MR 1508362 | 
| Reference:
             | 
[4] Drinfel’d, G. I.: On the measure of the Lie groups.Zap. Mat. Otdel. Fiz. Mat. Fak. Kharkov. Mat. Obsc. 21 (1949), 47–57 (in Russian). MR 0082632 | 
| Reference:
             | 
[5] Drinfel’d, G. I., Lucenko, A. V.: On the measure of sets of geometric elements.Vest. Kharkov. Univ. 31, 3 (1964), 34–41 (in Russian). MR 0196037 | 
| Reference:
             | 
[6] Lucenko, A. V.: On the measure of sets of geometric elements and thear subsets.Ukrain. Geom. Sb. 1, 3 (1965), 39–57 (in Russian). MR 0213983 | 
| Reference:
             | 
[7] Sachs, H.: Ebene isotrope Geometrie.Friedr. Vieweg and Sohn, Braunschweig, 1987. Zbl 0625.51001, MR 0908294 | 
| Reference:
             | 
[8] Sachs, H.: Isotrope Geometrie des Raumes.Friedr. Vieweg and Sohn, Braunschweig–Wiesbaden, 1990. Zbl 0703.51001, MR 1059891 | 
| Reference:
             | 
[9] Santaló, L. A., London: Integral Geometry and Geometric Probability.Addison-Wesley, London, 1976. MR 0433364 | 
| Reference:
             | 
[10] Stoka, M. I.: Geometrie Integrala.Ed. Acad. RPR, Bucuresti, 1967. MR 0217747 | 
| Reference:
             | 
[11] Strubecker, K.: Differentialgeometrie des isotropen Raumes I.Sitzungsber. Österr. Akad. Wiss. Wien 150 (1941), 1–53. MR 0018957 | 
| Reference:
             | 
[12] Strubecker, K.: Differentialgeometrie des isotropen Raumes II, III, IV, V.. Math. Z. 52 (1949), 525–573. MR 0029201 | 
| . |