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ALTIN, A., KABADAYI, H., SABUNCUOGLU, A.. (1389). LIGHTLIKE RULED AND REVOLUTION SURFACES IN 􀔹3 1. , 34(2), 95-101. doi: 10.22099/ijsts.2010.2168
A. ALTIN; H. KABADAYI; A. SABUNCUOGLU. "LIGHTLIKE RULED AND REVOLUTION SURFACES IN 􀔹3 1". , 34, 2, 1389, 95-101. doi: 10.22099/ijsts.2010.2168
ALTIN, A., KABADAYI, H., SABUNCUOGLU, A.. (1389). 'LIGHTLIKE RULED AND REVOLUTION SURFACES IN 􀔹3 1', , 34(2), pp. 95-101. doi: 10.22099/ijsts.2010.2168
ALTIN, A., KABADAYI, H., SABUNCUOGLU, A.. LIGHTLIKE RULED AND REVOLUTION SURFACES IN 􀔹3 1. , 1389; 34(2): 95-101. doi: 10.22099/ijsts.2010.2168

LIGHTLIKE RULED AND REVOLUTION SURFACES IN 􀔹3 1

Iranian Journal of Science
مقاله 1، دوره 34، شماره 2، مرداد 2010، صفحه 95-101    اصل مقاله (177.78 K)
شناسه دیجیتال (DOI): 10.22099/ijsts.2010.2168
نویسندگان
A. ALTIN1؛ H. KABADAYI* 2؛ A. SABUNCUOGLU2
1Hacettepe University, Faculty of Science, Department of Mathematics, 06550 Beytepe, Ankara, Turkey
2Ankara University, Faculty of Science, Department of Mathematics, 06100 Tandogan, Ankara, Turkey
چکیده
In this paper lightlike ruled surfaces in 􀔹3 1=(􀔹3,-dx2+dy2+dz2) are studied with respect to whether
ruling curves are spacelike or null. It is seen that, in the first case the Gaussian curvature of the ruled surfaces
vanishes. In the second case the Gaussian curvature of the ruled surfaces are negative. In the second case
lightlike ruled surfaces are totally umbilical. Furthermore, lightlike surfaces of revolution are shown to be
only cones, and the second type lightlike ruled surface.
کلیدواژه‌ها
Lightlike surface؛ lightlike ruled surface؛ lightlike revolution surface
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