We show that 4-dimensional conjugation manifolds are all obtained from branched 2-fold coverings of knotted surfaces in Z2-homology 4-spheres.

We discuss the possibility of observing atomic phase conjugation from Bose condensates, and using it as a diagnostic tool to access the spatial coherence properties and to measure the lifetime of the condensate. We argue that since phase conjugation results from the scattering of a partial matter wave off the spatial grating produced by two other waves, it offers a natural way to directly measu...

She notices the formal similarity between the stem tuk‘attachINTRANS’ in (1a) and tuke‘attachTRANS’ in (1b). These two represent the two main verb conjugations in Japanese: tukrepresents the consonant stem or godan conjugation, while tukerepresents the vowel stem or ichidan conjugation. The learner also notices the grammatical relationship between the two stems: tukis the intransitive and tuket...

r-phycoerythrin (r-pe), a fluorescent protein from phycobiliprotein family, is isolated from red algae. conjugation of antibodies to r-pe facilitates multiple fluorescent staining methods. in the present study polyclonal antibodies and polyclonal f(ab')2 fragment antibodies were conjugated to r-pe by two different methods. the efficiency of the methods was evaluated using immunocytochemistry (i...

We study the action of the symmetric group Σn on a tensor product of n − 1 copies of a commutative Hopf algebra A, defined by the second author [8]. We show that for ‘nice’ Hopf algebras, the cohomology algebra H∗(Σn;A⊗n−1) is independent of the coproduct if n.(n − 2)! is invertible in the ground ring. Let A be a graded, connected, unital, counital, associative, coassociative Hopf algebra. In s...