The Encyclopædia Britannica: The New Volumes, Constituting, in Combination with the Twenty-nine Volumes of the Eleventh Edition, the Twelfth Edition of that Work, and Also Supplying a New, Distinctive, and Independent Library of Reference Dealing with Events and Developments of the Period 1910 to 1921 Inclusive, Հատոր 26Encyclopædia Britannica Company, Limited, 1911 |
From inside the book
Արդյունքներ 20–ի 1-ից 5-ը:
Էջ 117
... tangent lines of a surface are a special complex . ) As distinct particular cases of the first figure we have the plane curve and the cone , and as a par- ticular case of the second figure the ruled surface , regulus or singly infinite ...
... tangent lines of a surface are a special complex . ) As distinct particular cases of the first figure we have the plane curve and the cone , and as a par- ticular case of the second figure the ruled surface , regulus or singly infinite ...
Էջ 118
... tangent plane ; but it will be it is among these that we have the non - special singularities which more convenient ... tangent the plane of the curve we have the vertex of the cone , to its tangents planes , and the locus of the points ...
... tangent plane ; but it will be it is among these that we have the non - special singularities which more convenient ... tangent the plane of the curve we have the vertex of the cone , to its tangents planes , and the locus of the points ...
Էջ 119
... tangent planes - in fact any plane through any one Ruled of the lines is a tangent plane of the surface , touching Surface . it at a point on the line , and in such wise that , as the tangent plane turns about the line , the point of ...
... tangent planes - in fact any plane through any one Ruled of the lines is a tangent plane of the surface , touching Surface . it at a point on the line , and in such wise that , as the tangent plane turns about the line , the point of ...
Էջ 120
... tangent plane at a point of the surface cuts the surface in a curve having at that point a node . Thus we have at the point of the surface two directions of passage to a consecutive point , or , say , two elements of arc ; and , passing ...
... tangent plane at a point of the surface cuts the surface in a curve having at that point a node . Thus we have at the point of the surface two directions of passage to a consecutive point , or , say , two elements of arc ; and , passing ...
Էջ 121
... tangent planes along the curve , these will intersect in a system of lines , termed the conjugate tangents , forming a developable surface . If we unroll this develop- able then di - do - dy , where di is the angle of geodetic con- the ...
... tangent planes along the curve , these will intersect in a system of lines , termed the conjugate tangents , forming a developable surface . If we unroll this develop- able then di - do - dy , where di is the angle of geodetic con- the ...
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