Changes

:<math>H_o=v/c/r</math>,  

:<math>H_o=v/c/r</math>,  

where <math>v</math> is assumed speed of recession of a galaxy, <math>c</math>, speed of light in vacuum, combined with <math>v</math> producing ''"redshift"'' <math>Z=v/c</math>, and <math>r</math> is distance from observer to the observed galaxy, and its exact value turned out to be  

where <math>v</math> is assumed speed of recession of a galaxy, <math>c</math>, speed of light in vacuum, combined with <math>v</math> producing ''"redshift"'' <math>Z=v/c</math>, and <math>r</math> is distance from the observer to the observed galaxy, and its exact value turned out to be  

:<math>H_o=c/R_E</math>,

:<math>H_o=c/R_E</math>,