Skip to content
Snippets Groups Projects
Commit 25c3fc65 authored by Luke Naylor's avatar Luke Naylor
Browse files

Refined the epsilon lemma/dfn

parent 34f6f773
No related branches found
No related tags found
No related merge requests found
Pipeline #27039 passed
......@@ -1032,6 +1032,10 @@ Where $\epsilon_q^1$ and $\epsilon_q^2$ are defined as follows:
\end{lemmadfn}
It's worth noting that $\epsilon_q^2$ is potentially larger than $\epsilon_q^2$
but calculating it involves a $\gcd$, a modulo reduction, and a modulo $n$
inverse, for each $q$ considered.
\begin{proof}
Consider the following tautology:
......@@ -1070,20 +1074,16 @@ Consider the following tautology:
\label{eqn:better_eps_problem_k_mod_n}
\end{align}
In our situation, we want to find a gap between the right-hand-side of eqn
\ref{eqn:positive_rad_condition_in_terms_of_q_beta},
and the least element of $\frac{1}{m}\ZZ$ which is strictly greater.
This amounts to finding the least $k \in \ZZ_{>0}$ for which
eqn \ref{eqn:finding_better_eps_problem} holds.
In our situation, we want to find the least $k$ satisfying
eqn \ref{eqn:finding_better_eps_problem}.
Since such a $k$ must also satisfy eqn \ref{eqn:better_eps_problem_k_mod_n},
we can pick the smallest $k \in \ZZ_{>0}$ which satisfies this new condition
(a computation only depending on $q$ and $\beta$, but not $r$)
and we are then guaranteed that the gap is at least $\frac{k}{2mn^2}$.
A potentially larger gap can also be guaranteed if we choose the least
$k \in \ZZ_{>0}$ satisfying eqn \ref{eqn:better_eps_problem_k_mod_gcd2n2_a2mn}
instead, but at the cost of computing several $\gcd$'s and modulo reductions
for each $q$ considered.
we can pick the smallest $k_q^1 \in \ZZ_{>0}$ which satisfies this new condition
(a computation only depending on $q$ and $\beta$, but not $r$).
We are then guaranteed that the gap $\frac{k}{2mn^2}$ is at least $\epsilon_q^1$.
Furthermore, $k$ also satisfies
eqn \ref{eqn:better_eps_problem_k_mod_gcd2n2_a2mn}
so we can also pick the smallest $k_q^2 \in \ZZ_{>0}$ satisfying this condition,
which also guarantees that the gap $\frac{k}{2mn^2}$ is at least $\epsilon_q^2$.
\end{proof}
......
0% Loading or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment