منابع مشابه
A Non-ribbon Plumbing of Fibered Ribbon Knots
A closer look at an example introduced by Livingston & Melvin and later studied by Miyazaki shows that a plumbing of two fibered ribbon knots (along their fiber surfaces) may be algebraically slice yet not ribbon. Trivially, the connected sum (i.e., 2-gonal Murasugi sum) of ribbon knots is ribbon. Non-trivially [6, 1], any Murasugi sum of fibered knots (along their fiber surfaces) is fibered. I...
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We prove that all generalized Montesinos links in S which are not classic S̃L2 -type are virtually fibred except the trivial link of two components. We also prove the virtually fibred property for a family of infinitely many classic Montesinos links of type S̃L2 . As a byproduct we find the first family of infinitely many virtually fibred hyperbolic rational homology 3-spheres.
متن کاملRibbon Crystals
A repetitive crystal-like pattern is spontaneously formed upon the twisting of straight ribbons. The pattern is akin to a tessellation with isosceles triangles, and it can easily be demonstrated with ribbons cut from an overhead transparency. We give a general description of developable ribbons using a ruled procedure where ribbons are uniquely described by two generating functions. This constr...
متن کاملRibbon synapses
Why are these synapses special? Because the electrical signals they transmit are not the same as those in other parts of the brain. Conventional synapses convey information arriving as a ‘pulse code’; action potentials lasting a few milliseconds trigger a transient burst of vesicle fusion and the amplitude of the action potential is fixed. But ribbon synapses transmit ‘analogue signals’, such a...
متن کاملRibbon Proofs
We present ‘Ribbon Proofs’, a graphical proof system for the Logic of Bunched Implications (BI). We give the informal, graphical, notation, we formalise the system algebraically and sketch the proof of its soundness and completeness. We discuss the spatial and geometrical nature of the proof system and its relation to BI’s spatial model theory.
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ژورنال
عنوان ژورنال: Journal of Knot Theory and Its Ramifications
سال: 2015
ISSN: 0218-2165,1793-6527
DOI: 10.1142/s0218216515500662