Independent joins of tolerance factorable varieties

Salt tolerance of sunflower varieties during germination

Joins of Projective Varieties and Multisecant Spaces

Let X1, . . . ,Xs ⊂ PN , s ≥ 1, be integral varieties. For any integers ki > 0, 1 ≤ i ≤ s, and t ≥ 0 set ~k := (k1, . . . , ks) and ~ X := (X1, . . . ,Xs). Let Sec( ~ X; t,~k) be the set of all linear t-spaces contained in a linear (k1 + · · · + ks − 1)-space spanned by k1 points of X1, k2 points of X2, . . . , ks points of Xs. Here we study some cases where Sec( ~ X ; t,~k) has the expected di...

Factorable Congruences and Strict Refinement

We show that universal algebras with factorable congruences such as rings with 1 and semirings with 0 and 1 enjoy some of the properties of universal algebras whose congruence lattices are distributive, such as the strict refinement property and a variant of Jónsson’s lemma. A universal algebra A is said to have factorable congruences if whenever A ∼= B × C and θ is a congruence on A, then θ = ...

Arc consistency for factorable relations

An optimal arc consistency algorithm AC-4 was given by Mohr and Henderson [8]. AC4 has cost 0(ea), and cost (na) for scene labelling. Although their algorithm is indeed optimal, under certain conditions a constraint satisfaction problem can be transformed into a less complex problem. In this paper, we present conditions and mechanisms for such transformations, and show how to factor relations i...

Screening of Salt Tolerance in Different Varieties of Hordeum vulgare

Soil salinity is the major abiotic stress in plant agriculture strongly influencing productivity worldwide and it delimit the crop yield. Several abiotic stresses are united by the fact that at least part of their detrimental effect on plant performance is caused by disruption of plant water status. This can occur through decreased availability of water in the environment during drought, altere...