- Full text PDF available (2)
- This year (0)
- Last five years (1)
A quasi-regular cell complex is defined and shown to have a reasonable barycentric subdivision. In this setting, Whitney's theorem that the ^-skeleton of the barycentric subdivision of a triangulated n-manifold is dual to the (n-/c)th Stiefel-Whitney cohomology class is proven, and applied to projective spaces, lens spaces and surfaces. 1. QR complexes. A… (More)
Field trials were conducted in 1974 and 1975 using an encapsulated formulation of methoprene (AltosidTM) applied as a feed additive at rates of 7.5 and 10.0 ppm (AI in feed) to control Musca domestica L. in poultry houses. Only limited inhibition of house fly emergence was obtained. In addition, the percentage of house fly emergence in each trial gradually… (More)
We prove that in many, perhaps all, torsion free hyperbolic groups, test elements are precisely those elements not contained in proper retracts. We also show that all Fuchsian groups have this property. Finally, we show that all surface groups except Z × Z have test elements.
Treatment of normal male Leghorn chickens with doses of estradiol ranging from .1 to 1.0 mg per week caused only a slight increase in resistance to infestation with northern fowl mites. The resistance phenomenon did not increase linearly with estradiol dose. Pullets were initially resistant to mite infestation; however, susceptibility was noted to increase… (More)