4 problems

Kleiman–Piene equisingularity conjecture. Universal polynomials in the pushdowns of products of the relative Chern classes of the family should enumerate curves with any given equi…

Kleiman–Piene conjecture. For every $r$, the class $[U(r)]$ is given by a universal polynomial in the classes $y(a,b,c)$.

Let $P_{5,(1,2,4,5)}$ be the pentagonal polynomial with coefficient vector $(1,2,4,5)$, and let … be the set of non-negative integers not represented by it over ${\mathbb N}_0$. Ex…

Let $a,b,c$ be positive integers. Say that $(a,b,c)$ has the desired property if every nonnegative integer $n$ can be represented as … with $x,y,z$ integers. Sun's universality con…