Uniwersytet Komisji Edukacji Narodowej w Krakowie

On a Pascal-type theorem for lines in ℙ 3

Abstract We prove a three-dimensional Pascal-type theorem for configurations of lines on a smooth quadric surface in ℙ 3 . Starting from two triples of skew lines in the two rulings of the quadric, we show that the associated grid of nine intersection points determines natural tr...

From Leaves to Roots: Seasonal Dynamics of Wild Boar (Sus scrofa) Use of Understory Plant Resources in a Forest–Agricultural Landscape of Central Poland

Wild boars (Sus scrofa) forage on plant resources located both above and below the soil surface, but it remains unclear whether these resources are exploited simultaneously or used as complementary food pools according to season. This study examined seasonal changes in the use of...