The homotopy classification of cross-sections

1962 ◽  
pp. 87-117 ◽  
Author(s):  
V. G. Boltyanskiĭ
Keyword(s):  
Cross Sections ◽  
Homotopy Classification

scholarly journals INFLUENCE OF PERIODIC SHADING ON THE LENGTH AND SOLIDNESS OF THE INTERNODES OF RESCUE WHEAT

1960 ◽  
Vol 40 (1) ◽  
pp. 183-187 ◽  
Author(s):  
N. D. Holmes ◽  
R. I. Larson ◽  
L. K. Peterson ◽  
M. D. MacDonald
Keyword(s):  
Light Intensity ◽  
Cross Sections ◽  
Strongly Correlated ◽  
Boot Stage ◽  
Stem Solidness ◽  
Heading Stage

Shading at the initiation of elongation shortened the internodes of Rescue wheat whereas shading later in the elongation period caused the internodes to elongate as much as or more than if they had not been shaded.The solidness of the bottom Internode, 1, was reduced mainly by shading from the 2-leaf to the boot stage, while that of Internodes 2 and 3 was reduced mainly by shading from the 4-leaf to the boot stage. The solidness of Internode 4 was reduced mainly by shading from the boot to the heading stage. The solidness in the lower 3 internodes was affected by reduction in light intensity even after the boot stage. Severe lodging occurred only in stems shaded from the boot to the heading stage.Two methods were used for rating stem solidness, namely, measurement in the split stem of proportion of the internode filled with pith, and classification of solidness of cross-sections at designated points in each internode. They were strongly correlated and appeared to give equally accurate estimates of solidness, although their degrees of sensitivity varied with the amount of stem solidness present.

scholarly journals Homotopy classification of elliptic operators on stratified manifolds

2006 ◽  
Vol 73 (3) ◽  
pp. 407-411 ◽  
Author(s):  
V. E. Nazaikinskii ◽  
A. Yu. Savin ◽  
B. Yu. Sternin
Keyword(s):  
Elliptic Operators ◽  
Homotopy Classification

On Graded Categorical Groups and Equivariant Group Extensions

2002 ◽  
Vol 54 (5) ◽  
pp. 970-997 ◽  
Author(s):  
A. M. Cegarra ◽  
J. M. Garćia-Calcines ◽  
J. A. Ortega
Keyword(s):  
Group Cohomology ◽  
Group Extension ◽  
Extension Problem ◽  
Homotopy Classification ◽  
Group Extensions ◽  
Categorical Groups

AbstractIn this article we state and prove precise theorems on the homotopy classification of graded categorical groups and their homomorphisms. The results use equivariant group cohomology, and they are applied to show a treatment of the general equivariant group extension problem.

scholarly journals Stable homotopy classification of BGp̌

Topology ◽  
1995 ◽  
Vol 34 (3) ◽  
pp. 633-649 ◽  
Author(s):  
John Martino ◽  
Stewart Priddy
Keyword(s):  
Stable Homotopy ◽  
Homotopy Classification
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