Abstract Several studies investigating the trade effects of standardization have found a positive impact number international standards in country on its volumes. While so far been considered as exogenous, we investigate what drives countries to take over leading roles, i.e. secretariats, committees International Organization for Standardization (ISO) using panel dataset ISO participation 12 co...

They also conjectured that for Jki<feâ£o, pk!(n)Spk2(n) and for ko<h<k2i pki(n)<pk2(n). They verify this conjecture for n^32. Recently Todd published a table of all the pkin) for n^lOO, and it is easy to verify the conjecture for w^glOO. I am unable to prove or disprove this conjecture. They also remark that pk0{n) differs from c-inm i0g n by i e s s than 1 for n^ 32; (2) shows that for large n...

Given an r × r complex matrix T , if T = U |T | is the polar decomposition of T , then, the Aluthge transform is defined by ∆ (T ) = |T |U |T |. Let ∆n(T ) denote the n-times iterated Aluthge transform of T , i.e. ∆0(T ) = T and ∆n(T ) = ∆(∆n−1(T )), n ∈ N. We prove that the sequence {∆n(T )}n∈N converges for every r × r matrix T . This result was conjecturated by Jung, Ko and Pearcy in 2003. W...

We propose a homological approach to two conjectures descended from the Erdős-Ko-Rado Theorem, one due to Chvátal and the other to Frankl and Füredi. We apply the method to reprove, and in one case improve, results of these authors related to their conjectures.

We consider Erdős-Ko-Rado sets of generators in classical finite polar spaces. These are sets of generators that all intersect non-trivially. We characterize the Erdős-Ko-Rado sets of generators of maximum size in all polar spaces, except for H(4n+ 1, q) with n ≥ 2.

Rubella virus usually causes a mild infection in humans but can cause congenital rubella syndrome (CRS). Vaccination programs have significantly decreased primary rubella virus infection and CRS; however, vaccinated individuals usually have lower levels of rubella virus IgG than those with natural infections. Rubella virus IgG is quantified with enzyme immunoassays that have been calibrated aga...

Two set partitions of an n-set are said to t-intersect if they have t classes in common. A k-partition is a set partition with k classes and a k-partition is said to be uniform if every class has the same cardinality c = n/k. In this paper, we prove a higher order generalization of the Erdős-Ko-Rado theorem for systems of pairwise t-intersecting uniform k-partitions of an n-set. We prove that f...

We prove a p-part extension of the Erdős-Ko-Rado Theorem and suggest several related open problems. For the basic case of two parts we describe two proofs, a combinatorial one and a spectral one.

We describe the space of E∞ spin orientations of KO and the space of E∞ string orientations of tmf.