add fast sqrt paper link

diff --git a/3d_gpu.mdwn b/3d_gpu.mdwn
index 7ae5a379965f30a794711878f825b8773ba34797..7ef5e85a1edce60d445d4e84e6bbf6bfe3f5078c 100644 (file)
--- a/3d_gpu.mdwn
+++ b/3d_gpu.mdwn
@@ -80,6 +80,7 @@ Progress:
 * <http://smallcultfollowing.com/babysteps/blog/2019/04/19/aic-adventures-in-consensus/>
 * <http://www.crnhq.org/12-Skills-Summary.aspx?rw=c>
 * <http://bugs.libre-riscv.org/buglist.cgi?columnlist=assigned_to%2Cbug_status%2Cresolution%2Cshort_desc%2Ccf_budget&f1=cf_nlnet_milestone&o1=equals&query_format=advanced&resolution=---&v1=NLnet.2019.02>
+* <https://pdfs.semanticscholar.org/5060/4e9aff0e37089c4ab9a376c3f35761ffe28b.pdf>
 
 # Analog Simulation