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48 results for alternative proof

Alternative proof of coisotropic embedding theorem for pre-symplectic manifolds.

problem Proving the coisotropic embedding theorem for pre-symplectic manifolds.
method Recast geometric choice of connection as algebraic embedding into cotangent bundle, identify symplectic thickening as submanifold of Hamiltonian momenta conjugate to kernel directions.
result Alternative proof of the coisotropic embedding theorem.

This paper is devoted to prove the existence of qq-periodic alternating projections of prime alternating qq-periodic knots. The main tool is the Menasco-Thistlethwaite's Flyping theorem. Let KK be an oriented prime alternating knot that is qq-periodic with q3q\geq 3, i.e. KK admits a symmetry that is a rotation of…

2019-05-31abs ↗pdf ↗

This paper gives two new combinatorial topological proofs of the classification of rational tangles. Each proof rests on an elegant lemma showing that rational tangles are isotopic to canonical alternating rational tangles. The first proof defines the tangle fraction from the canonical form and uses flyping to prove in…

2003-11-27abs ↗pdf ↗

The study proves a theorem for alternating knots in handlebodies.

problem Understanding the properties of alternating knots in handlebodies.
method Generalization of the Jones polynomial to handlebodies.
result Any dotted-reduced alternating diagram of a knot in a handlebody realizes the minimal crossing number and has identical writhe to any other diagram of the same knot.

Alternative proof of Khovanov's up-to-sign functoriality for odd Khovanov homology.

problem Functoriality of Khovanov's odd Khovanov homology.
method Extending Hochschild (co)homology to quasi-associative algebras and applying it to Khovanov's homology.
result First proof of functoriality of Naisse and Putyra's tangle theory up to unit.

We establish a characterization of alternating links in terms of definite spanning surfaces. We apply it to obtain a new proof of Tait's conjecture that reduced alternating diagrams of the same link have the same crossing number and writhe. We also deduce a result of Banks and Hirasawa-Sakuma about Seifert surfaces for…

2015-11-19abs ↗pdf ↗

New proof of trapezoidal property for Alexander polynomials of special alternating links.

problem Proving trapezoidal property of Alexander polynomials for special alternating links.
method Analyzing vector configurations from matroids and totally positive matrices.
result Alexander polynomials of special alternating links exhibit log-concavity and trapezoidal properties.

X.S. Lin and O. Dasbach proved that the sum of the absolute value of the second and penultimate coefficients of the Jones polynomial of an alternating knot is equal to the twist number of the knot. In this paper we give a new proof of their result using Khovanov homology. The proof is by induction on the number of cros…

2006-09-11abs ↗pdf ↗

We provide an alternative, simpler proof of the existence of thick triangulations for noncompact C1\mathcal{C}^1 manifolds. Moreover, this proof is simpler than the original one given in \cite{pe}, since it mainly uses tools of elementary differential topology. The role played by curvatures in this construction is also…

2008-12-02abs ↗pdf ↗

In this paper we define alternating Kauffman states of links and we characterize when the induced state surface is a fiber. In addition, we give a different proof of a similar theorem of Futer, Kalfagianni and Purcell on homogeneous states.

2015-06-18abs ↗pdf ↗

Alternative proof of weak solutions to mean curvature flow using minimizing movements.

problem Existence of weak solutions to mean curvature flow and volume preserving mean curvature flow.
method Proposes a new existence proof using a minimizing movements scheme and a novel proxy for distance.
result Unconditional convergence towards a De Giorgi solution for the minimizing movements scheme.

We study the set of Crowell states for alternating knot projections and show that for prime alternating knots the space of states for a reduced projection is connected, a result similar to that for Kauffman states. As an application we give a new proof of a result of Ozsvath and Szabo characterizing (2,2n+1) torus knot…

2012-10-14abs ↗pdf ↗

We give an alternative proof of Madsen-Weiss' generalized Mumford conjecture. Our proof is based on ideas similar to Madsen-Weiss' original proof, but it is more geometrical and less homotopy theoretical in nature. At the heart of the argument is a geometric version of Harer stability, which we formulate as a theorem a…

2009-07-24abs ↗pdf ↗

In this note, we complete the classification of quasi-alternating Montesinos links. We show that the quasi-alternating Montesinos links are precisely those identified independently by Qazaqzeh-Chbili-Qublan and Champanerkar-Ording. A consequence of our proof is that a Montesinos link LL is quasi-alternating if and onl…

2017-01-29abs ↗pdf ↗

In Karatzas and Kardaras's paper on semimartingale financial models, it is proved that the NUPBR condition is a property of the local characteristic of the asset process alone. In Takaoka's paper on NUPBR, it is proved that the NUPBR condition is equivalent to the existence of a simga-martingale deflator. However, Taka…

2013-06-05abs ↗pdf ↗

New proof of surface group theorem for 2D Poincaré duality groups.

problem Characterizing groups with specific algebraic properties.
method Analyzing amenability and homological isoperimetric inequalities.
result Groups satisfying certain conditions are either amenable or have linear homological isoperimetric inequalities.

In this note we provide a proof of the following: Any compact KRS with positive bisectional curvature is biholomorphic to the complex projective space. As a corollary, we obtain an alternative proof of the Frankel conjecture by using the Kähler-Ricci flow.

2008-06-17abs ↗pdf ↗

Alternative proof and description of orientations for instanton moduli spaces.

problem Describing the relation between different orientations of GG-instanton moduli spaces.
method Using Witten localization of the index of a Dirac type operator.
result Alternative construction and proof of orientability of instanton moduli spaces.