8080 



Line Geometry. Congruences 



8080 



Kummer's surface, mode of generating. Hum- 

 bert, G. Palermo Cir. Mt. Ed. 11 (1897) 1-. 



Lines with given moments with reference to 

 fixed lines. Segre, C. Crelle J. Mth. 97 

 (1884) 96-. 



Null spaces of a one- system and associated 

 complexes. Young, W. H. [1898] L. Mth. 

 S. P. 30 (1899) 33-. 



system, curves self -reciprocal in. Stein- 

 metz, C. P. [1891] Am. J. Mth. 14 (1892) 

 161-. 



and line complex, relation to polar 

 system of paraboloid of revolution. Hauck, 

 G. Z. Mth. Ps. 31 (1886) 362-. 



, Mobius's, shortest and straightest lines 



in. Liebmann, H. Mth. A. 52 (1899) 



120-. 

 , quadratic. Timerding, H. E. A. Mt. 



2 (1899) 239-. 

 , theory. Dohlemann, K. D. Mth. Vr. 



Jbr. 3 (1894) 96-. 



systems, higher. Sturm, E. Mth. A. 28 

 (1887) 277-. 



, invariant configurations. Mertens, F. 



Wien Ak. Sb. 97 (1889) (Ab. 2a) 519-. 

 Polar and null systems, comparison. Schmid, 



T. Mh. Mth. Ps. 8 (1897) 267-. 

 Bay systems with focal surfaces of 4th degree 



having 16 singular points. Kummer, E. E. 



Berl. Mb. (1864) 495-. 

 Screw motion, null system and line complex of. 



Kiipper, G. Mh. Mth. Ps. 1 (1890) 95-. 

 Skew curve, 3rd degree, condition that 4 



straight lines should touch. Kluyver, J. C. 



Amst. Ak. Vs. M. 8 (1891) 41-; Arch. Neerl. 



25 (1892) 70-. 



surfaces, genus 0, asymptotic lines. Pitta- 

 relli, G. Em. B. Ac. Line. Bd. 7 (1891) 

 (Sem. 1) 391- . 



, rational, Cayley's, asymptotic lines. 

 Pittarelli, G. Em. E. Ac. Line. Bd. 7 

 (1891) (Sem. 1) 452-. 



Surfaces of same degree as their polar recipro- 

 cals, and with same singularities. Kummer, 

 E. E. Berl. Ak. Mb. (1878) 25-. 



Tetrahedral symmetrical curves. Demoulin, A . 

 C. B. 115 (1892) 280-, 362. 



Transformation, Lie's, and surfaces which are 

 envelopes of spheres. Demoulin, A. Bll. 

 Sc. Mth. 22 (1898) 174-. 



CONGBUENCES. 



Monge, G. Par. EC. Pol. Cor. 3 (1814-16) 



152-. 

 Transon, (Prof.) A. Par. J. EC. Pol. 38 e cah. 



(1861) 195-. 

 (Transon.) Chasles, M. C. B. 52 (1861) 



1013-. 



Frischauf, J. Z. Mth. Ps. 16 (1871) 159-. 

 Weiler, A. Z. Mth. Ps. 31 (1886) 18-. 

 Bianchi, L. Bm. B. Ac. Line. Bd. 3 (1887) 



(Sem. 1) 369-; A. Mt. 15 (1887-88) 161-. 

 Gorton, W. C. L. Am. J. Mth. 10 (1888) 



347-. 



Cosserat, E. C. B. 115 (1892) 929-. 

 Palatini, F. Yen. I. At. (1894-95) 711-. 

 Guichard, G. C. B. 126 (1898) 1183-. 



Cifarelli, T. A. Mt. 2 (1899) 139-. 

 Demoulin, A. C. B. 130 (1900) 1701-. 

 Zeeman, P. (Gz.) Fschr. Mth. (1900) 648. 

 algebraic, classification. Schumacher, E. Mth. 



A. 37 (1890) 100-. 



arising in representation of surfaces. Caporali, 



E. Nap. Ed. 18 (1879) 244-. 

 associated. Guichard, C. C. B. 124 (1897) 



669-. 

 asymptotic lines corresponding on 2 sheets of 



focal surface. Guichard, C. C. E. 110 



(1890) 126-. 

 of ruled surfaces in. Pittarelli, G. Em. 



B. Ac. Line. Ed. 3 (1894) (Sem. 2) 111-, 

 148-, 229-, 264. 



whose generators belong to. 



Bioche, C. Par. S. Mth. Bll. 19 (1891) 39-. 

 of central axes of complexes to which 3 straight 



lines belong. Demoulin, A. Par. S. Mth. 



Bll. 21 (1893) 92-. 



class. Guicliard, C. C. E. 112 (1891) 1424-. 

 . Petot, A. C. E. 113 (1891) 841-. 

 2 classes. Demoulin, A. Bll. Sc. Mth. 18 



(1894) 233-. 



of conies in space. Montesano, D. Mil. I. 

 Lomb. Ed. 26 (1893) 589-; Nap. Bd. 34 



(1895) 93-, 155-. 



connected with hyperboloid. Waelsch, E. 



Wien Ak. Sb. 95 (1887) (Ab. 2) 781-. 

 surfaces of 2nd degree. Budio, F. Ziir. 



Vjschr. 41 (1896) (Festschr., Th. 2) 76-. 

 3rd and 4th degrees. Schur, F. 



Crelle J. Mth. 95 (1883) 207-. 

 theory of surfaces. Alexejeff, W. G. 



Fschr. Mth. (1899) 586. 

 Cremonian. Hirst, T. A. [1880] L. Mth. S. 



P. 14 (1882-83) 259-. 

 , contained in linear complex. Hirst, T. A. 



L. Mth. S. P. 17 (1887) 287-. 

 cyclic, theorem of Cosserat. Tzitzeica, . 



C. B. 127 (1898) 167-. 



, and triply conjugate systems. Tzitzeica, G. 



Par. EC. Norm. A. 16 (1899) 137-. 

 deformation, and some classes of applicable 



surfaces. Bianchi, L. Em. E. Ac. Line. 



Ed. 9 (1900) (Sem. 2) 185-. 

 enumerative geometry. Martinetti, V. Bv. 



Mt. 3 (1893) 108-. 

 without focal surface. Sturm, E. Hamb. 



Mth. Gs. Mt. 2 (1890) (Festschr., Tl. 2) 61-. 

 focal surfaces. Voss, (Dr) A. Gott. Nr. (1873) 



611-. 

 and focal surfaces of 2 related surfaces. Voss, 



A. Mth. A. 30 (1887) 227-. 

 focal surfaces of, and surfaces of singularity of 



complexes. Pasch, M. [1872] Crelle J. 76 



(1873) 156-. 

 2 focal systems cyclic. GuicJiard, G. C. B. 



131 (1900) 1177-. 

 forming group of tangents to surface. Geisen- 



heimer, L. Z. Mth. Ps. 18 (1873) 33-. 

 fundamental formulae. Burgatti, P. Bm. B. 



Ac. Line. Bd. 8 (1899) (-Sem. 1) 515-. 

 and general complex of 3rd degree. Veneroni, 



E. Mil. I. Lomb. Ed. 31 (1898) 1072-. 

 generated by 2 planes in (1, 2) correspondence. 



Conti, L Palermo Cir. Mt. Bd. 1 (1887) 



230- ; 2 (1888) 97-. 



580 



