# R2.1/4

Robert P. Munafo, 2010 Sep 21.

R2.1/4 is the R2-name for a mu-unit of period 4. Its owner is the mu-atom R2.1/4a, located at approximately 0.28 + 0.53i. Its mirror image is R2.3/4.

A colloquial name for R2.1/4 is the "northeast radical" (or "northeast bulb" referring to R2.1/4a).

Its bond point and the associated cusps (which are colloquially
called quad spiral valley) are located at the exact
rational coordinate ^{1}/_{4}+^{1}/_{2}i.

Here is a picture:

0.3191 + 0.6007 i @ +0.2500 | ._, _ '-:]: \__ . ``m,_/'` ._\^;_, ..\.@- ''"` . _/_, . ._"_7F^v"/ ' '-*~b._, ,., __ ,./"L . '^")*`., 'C, ., -*(L_ .L .""@"Yve(F.m*` -*"~)* :-:,__'~,. .,_aF*rC"^ _, ., :m\[._vae"m*@'C``- c _,., -/Cd@",_, ., -Yb/[m- .,,,__"L-*"^'`' e, _e_d$/b -"mF"*bF"_%bbc._.adC`_,:"@Ld**`\\a, . ^ '^a@C\,mL@c -*"*d*@_m:%@/*Y@mLdF"(\-- 'Y\a(, _am_ :_e7@^^*`' ''*\@` -d"m` :-)\ a__c @@@@c -*TCmF^ ^ a@be_m\_- ^"'\`e, .$*%_e, :m/$- ~m-bYd/^@"- '` '*"TTF, )@r '@r.._ ^ ^TC_ -@c R2.1/4a '"d/@- ., '"),Y[ .@/)e .__b_:_c '-), .'^Y@^,'FC^^'""` '~ ,a"mm@**)(b"/_, .,-@F^:^'^`'(%,`^ -____..,_._,v/*v@L@CYe ` R2a ^d%"""**b(*/F" '"^ ^^ 0.3191 +0.6007 i @ +0.2500, Nmax: 1000 |

revisions: 20031230 oldest on record; 20100921 add image, expand description

From the Mandelbrot Set Glossary and Encyclopedia, by Robert Munafo, (c) 1987-2018. Mu-ency index

This page was written in the "embarrassingly readable" markup language RHTF, and was last updated on 2018 Feb 04. s.11