مطالعه ی واپاشی j????^0 ?^0

The Rank of Quotients of J0(n)

Component Groups of Quotients of J0(N)

Let f be a newform of weight 2 on Γ0(N), and let Af be the corresponding optimal abelian variety quotient of J0(N). We describe an algorithm to compute the order of the component group of Af at primes p that exactly divide N . We give a table of orders of component groups for all f of level N ≤ 127 and five examples in which the component group is very large, as predicted by the Birch and Swinn...

Pattern 1^j0^i avoiding binary words

In this paper we study the enumeration and the construction, according to the number of ones, of particular binary words avoiding the fixed pattern p( j, i) = 1 j0i, 0 < i < j. The growth of such words can be described by particular jumping and marked succession rules. This approach enables us to obtain an algorithm which constructs all binary words having a fixed number of ones and then kills ...

Explicit Upper Bound for the (Analytic) Rank of J0(q)

We refine the techniques of our previous paper [KM1] to prove that the average order of vanishing of L-functions of primitive automorphic forms of weight 2 and prime level q satisfies ∑ f∈S2(q)∗ ords= 1 2 L(f, s) ≤ C|S2(q) ∗| with C = 6.5, for all q large enough. On the Birch and Swinnerton-Dyer conjecture, this implies rank J0(q) ≤ C dim J0(q) for q prime large enough.

آهنگ واپاشی بتا در 12Be

چکیده واپاشی بتا یکی از مدهای واپاشی معمول در هسته ها می باشد که بسیاری از هستنه ها بطور طبیعی و در حالت ناپایدار این نوع تابش را ساطح می کنند. در این مقاله ضمن مطالعه ساختار هسته های 12Be ،12B و 12Cبا استفاده از مدل میدان متوسط و بکار گیری پتانسیل وودز-ساکسون که یکی از معتبرترین پتانسیلهای هسته ای می باشد، دامنه توابع موج حالتهای جفت شده این هسته هامورد بررسی و مطالعه قرار گرفته است. با استفاد...

بررسی‌های ساختاری و مغناطیسی نانوذرات‌ پروسکایت LaMn1-xCoxO3 (0/1، 75/0، 5/0، 25/0، 0/0 = x)

In this work, the structural and magnetic properties of LaMn1-xCoxO3 (x = 0.00, 0.25, 0.50, 0.75, 1.00) are investigated. The structural characterization of compounds by X-ray powder diffraction is evidence for a rhombohedral structure (R -3c space group). Much less increase of the unit cell volume suggests that Co enters in lattice as Co+2 for x ≤ 0.5 while much more decrease of the unit cell ...