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Auslander's formula for contravariantly finite subcategories

期刊: JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN, 2021; 73 (2)

Let A be a right coherent ring and chi be a contravariantly finite subcategory of mod-A containing projectives. In this paper, we construct a recollem......

Extremal trigonal fibrations on rational surfaces

期刊: JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN, 2021; 73 (2)

For a relatively minimal fibration f : X -> P-1 of non-hyperelliptic curves of genus g, we know the Picard number rho(X) <= 3g + 8. We study the......

Residue formula for an obstruction to coupled Kahler-Einstein metrics

期刊: JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN, 2021; 73 (2)

We obtain a residue formula for an obstruction to the existence of coupled Kahler-Einstein metrics described by Futaki-Zhang. We apply it to an exampl......

Existence of sign-changing solutions for p(x)-Laplacian Kirchhoff type problem in R-N

期刊: JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN, 2021; 73 (1)

The p(x)-Laplacian Kirchhoff type equation involving the nonlocal term b integral(RN)(1/p(x))vertical bar del u vertical bar(p(x))dx is investigated. ......

Diagram automorphisms and quantum groups

期刊: JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN, 2020; 72 (2)

Let U-q(-) = U-q(-)(g) be the negative part of the quantum group associated to a finite dimensional simple Lie algebra g, and sigma : g -> g be the......

Combinatorics of double loop suspensions, evaluation maps and Cohen groups

期刊: JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN, 2020; 72 (3)

We reformulate Milgram's model of a double loop suspension in terms of a preoperad of posets, each stage of which is the poset of all ordered partitio......

Two-weighted estimates for positive operators and Doob maximal operators on filtered measure spaces

期刊: JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN, 2020; 72 (3)

We characterize strong type and weak type inequalities with two weights for positive operators on filtered measure spaces. These estimates are probabi......

Classifying tau-tilting modules over the Auslander algebra of K[x]/(x(n))

期刊: JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN, 2020; 72 (3)

We build a bijection between the set s tau-tilt Lambda of isomorphism classes of basic support tau-tilting modules over the Auslander algebra Lambda o......

Automorphism groups of smooth cubic threefolds

期刊: JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN, 2020; 72 (4)

In this paper, we classify groups which faithfully act on smooth cubic threefolds. It turns out that there are exactly 6 maximal ones and we describe ......

On n-trivialities of classical and virtual knots for some unknotting operations

期刊: JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN, 2019; 71 (1)

In this paper, we introduce a new nontrivial filtration, called F-order, for classical and virtual knot invariants; this filtration produces filtered ......

JIF:0.5

Equivalence of Littlewood Paley square function and area function characterizations of weighted product Hardy spaces associated to operators

期刊: JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN, 2019; 71 (1)

Let L-1 and L-2 be nonnegative self-adjoint operators acting on L-2(X-1) and L-2 (X-2), respectively, where X-1 and X-2 are spaces of homogeneous type......

JIF:0.5

Good tilting modules and recollements of derived module categories, II

期刊: JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN, 2019; 71 (2)

Homological tilting modules of finite projective dimension are investigated. They generalize both classical and good tilting modules of projective dim......

JIF:0.5

A proof of Saitoh's conjecture for conjugate Hardy H-2 kernels

期刊: JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN, 2019; 71 (4)

In this article, we obtain a strict inequality between the conjugate Hardy H-2 kernels and the Bergman kernels on planar regular regions with n > 1......

JIF:0.5

Optimal problem for mixed p-capacities

期刊: JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN, 2019; 71 (4)

In this paper, the optimal problem for mixed p-capacities is investigated. The Orlicz and L-q geominimal p-capacities are proposed and their propertie......

JIF:0.5

A characterization of regular points by Ohsawa-Takegoshi extension theorem

期刊: JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN, 2018; 70 (1)

In this article, we present that the germ of a complex analytic set at the origin in Cm is regular if and only if the related OhsawaT-akegoshi extensi......

JIF:0.5

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