Determine number of zeros using Rouché Theorem
96859
Find the number of zeroes of $p(z)=z^6+z^3+10z^2+4z+3$ inside the annulus $1<|z|<2$
57981
Alternative proof of $a\times0= 0$
38160
Number of roots of $z^4+z^3+4z^2+2z+3=0$ in each quadrants
59073
Method for Counting the Divisors of a number
119048
What is the Euler Totient of Zero?
154322
Localizing the zeros of $z^4+z+1$
41193
Number of integral roots of a polynomial
2959
Prove $0! = 1$ from first principles
141254
Zeros of analytic function of several real variables
52043
Number of binary numbers with two consecutive zeros
147159
Determine the set of values of $\exp(1/z)$ for $0<|z|<r$
15000
Show that number of elements in $(Z/nZ)^*$ is $\phi (n)$
47688
Number of roots of differentiable function
37958
Derive a formula to find the number of trailing zeroes in $n!$
69228
Factorial of 0 - a convenience?
2705
How many roots have modulus less than $1$?
17926
Zero divisor in $R[x]$