La numérotation Sosa


Sosa-Stradonitz numbering Would you mind apologizing me for mistakes in following text, pointing them and....mailing corrections to me

In genealogy , for numbering ancestors of some person is used

Sosa Stradonitz numbering
(in abbreviated form Sosa numbering).

In that numbering the number 1 is allocated to the family tree root of the genealogya person named "de cujus"
To her father the number 2 ,is allocated ,to her mother number 3 and to her four grandparents numbers 4, 5, 6 and 7
As a rule, if a person of the ancestry has N as number Sosa :

her father has 2 x N for Sosa number and her mother has 2 x N+1

For every man , his Sosa number N is even (except for the "de cujus") and his spouse has N+1 for Sosa number and it is odd. For every woman her Sosa number N is odd and his husband has N-1 for Sosa number

His or her son or daughter has integer(N / 2) for Sosa number

Ancestors of g generation have Sosa numbers from 2^g to 2^g+1-1 and that generation includes 2^g ancestors.

Nr generation	Birthday	relationship	Sosa numbers
	1970/1980	de cujus	1
I	1940/1950	parents	2, 3
II	1910/1920	grandparents	4, 5, 6 ,7
III	1880/1890	great-grandparents	8, 9, 10, 11, 12, 13, 14, 15
IV	1850/1860	ancestors 5^thgeneration	from 32 to 63
VI	1790/1800	ancestors 6^thgeneration	from 64 to 127
VI	1760/1770	ancestors 7^th generation	from 128 to 255
VII	1730/1740	ancestors 8^th generation	from 256 to 511
VIII	1700/1710	ancestors 9^th generation	from 512 to 1023
IX	1670/1680	ancestors 10^thgeneration	from 1024 to 2047
aa	aa	aa	aa
XIX	1370/1380	ancestors 19^th generation	from 524.288 to 1.048.575
aa	aa	aa	aa
XXXVII	740/750 (Charlemagne)	ancestors 37^th generation	from 1,4 x 10 ¹¹ to 2,8 x 10¹¹i.e 140 billion ancestors

An ancestor may have several Sosa numbers (if he is implexe).
It has to be said that Sosa numbering is used only for direct ancestors of the person studied.

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