Skip to content

2-very ampleness for adjoint bundles of ample and spanned by Lanteri A.

By Lanteri A.

Show description

Read Online or Download 2-very ampleness for adjoint bundles of ample and spanned vector bundles on surfaces PDF

Similar nonfiction_1 books

The Last Great Walk: The True Story of a 1909 Walk from New York to San Francisco, and Why it Matters Today

In 1909, Edward Payson Weston walked from manhattan to San Francisco, masking round forty miles an afternoon and greeted by means of wildly cheering audiences in each urban. the hot York instances referred to as it the "first bona-fide stroll . . . around the American continent," and eagerly chronicled a trip within which Weston was once beset by means of fatigue, mosquitos, vicious headwinds, and brutal warmth.

Extra info for 2-very ampleness for adjoint bundles of ample and spanned vector bundles on surfaces

Example text

RAMSAUERI? Quenst. PI. 3, Fig. 21, 21 ai (A. Eamsaueri, Q. Hauer; Die Cephalopoden des Salzkammergutes, p. 22, pi. 8, figs. ) Two or three imperfect specimens of this Ammonite were found by Messrs. Brewer and King at Gifford's Ranch, Plumas County, the most perfect of which is figured. They agree in all external characters with figures 5 and 6 above quoted; and, in the absence of proof to the contrary, I have referred them to Quenstedt's species. The peculiar, irregularly placed, nodose ribs, the minute umbilicus, and the evidently subglobose form of the shell before distortion, forbid a separation; unless larger specimens should want the angle which forms on the dorsum of adults of the European form; or some difference should be detected in the septum.

55 inch. A specimen was collected by Mr. R. Homfray, near Star City, Humboldt, six inches in diameter, and with a row of large nodes on the middle of the whorl, from which the ribs bifurcated. TRIASSIC FOSSILS. 25 This shell is closely allied to A. scaphitiformis, Hauer; but the umbilicus seems to be larger; and the septum, which is of the same general style, is much more complex, especially in the dorsal and superior lateral lobes. A . AUSSEANUS, Hauer. Plate 3, Figs. 16 and 17. subglobose; whorls deeply enveloping, increasing very gradually in size.

Surface marked by from forty to fifty irregular, radiating ribs, alternating in size, and crossed by fine, squamose, concentric lines. Figures, natural size, and a magnified view of the surface. Locality: Gifford's Ranch, Plumas County, California; collected by Prof. Brewer; and Star District, Humboldt County, Nevada Territory, by Mr. Homfray. This shell is very closely allied to M. salinaria, Bronn; but differs from that species, as figured by Goldfuss, in being less oblique, more prominent below, less produced behind ; in the anterior end being regularly rounded above, instead of bearing a small angle, and in the ear being shorter and broader.

Download PDF sample

Rated 4.93 of 5 – based on 16 votes