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  2. List of SMTP server return codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SMTP_server_return...

    X.3.XXX Mail System Status. X.4.XXX Network and Routing Status. X.5.XXX Mail Delivery Protocol Status. X.6.XXX Message Content or Media Status. X.7.XXX Security or Policy Status. The meaning of the "detail" field depends on the class and the subject, and are listed in RFC 3463 and RFC 5248 . A server capable of replying with an Enhanced Status ...

  3. Haplogroup G-FGC7535 - Wikipedia

    en.wikipedia.org/wiki/Haplogroup_G-FGC7535

    Haplogroup G-FGC7535, also known as Haplogroup G2a1 (and formerly G-L293), [1] is a Y-chromosome haplogroup. It is an immediate descendant of G2a (G-P15), which is a primary branch of haplogroup G2 (P287). G2a1 has an extremely low frequency in almost all populations except parts of the Caucasus Mountains . In 2017, the SNP L293 was replaced by ...

  4. Error correction code - Wikipedia

    en.wikipedia.org/wiki/Error_correction_code

    A simplistic example of ECC is to transmit each data bit 3 times, which is known as a (3,1) repetition code. Through a noisy channel, a receiver might see 8 versions of the output, see table below. Through a noisy channel, a receiver might see 8 versions of the output, see table below.

  5. 2,4,5-Trichlorophenoxyacetic acid - Wikipedia

    en.wikipedia.org/wiki/2,4,5-Trichlorophenoxy...

    2,4,5-Trichlorophenoxyacetic acid (also known as 2,4,5-T ), a synthetic auxin, is a chlorophenoxy acetic acid herbicide used to defoliate broad-leafed plants. It was developed in the late 1940s, synthesized by reaction of 2,4,5-Trichlorophenol and chloroacetic acid. It was widely used in the agricultural industry until being phased out ...

  6. 1 − 2 + 3 − 4 + ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%E2%88%92_2_%2B_3_%E2%88...

    The idea becomes clearer by considering the general series 1 − 2x + 3x 2 − 4x 3 + 5x 4 − 6x 5 + &c. that arises while expanding the expression 1 ⁄ (1+x) 2, which this series is indeed equal to after we set x = 1.

  7. Haplogroup G-M377 - Wikipedia

    en.wikipedia.org/wiki/Haplogroup_G-M377

    In the supplemental data from Behar et al. (2004), among the Ashkenazi Jewish G haplotypes haplotypes 4 and 6-15 are G-M377, 2,3,5 are G-M285, and the haplogroup of the first listed is unclear. In a sample of 955 haplogroup G haplotypes, there are 103 Ashkenazi G-M377 and 14 Ashkenazi G-M285. Among Jews in Israel drawn from many areas of the ...

  8. 1 + 2 + 3 + 4 + ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%2B_2_%2B_3_%2B_4_%2B_%E...

    The partial sums of the series 1 + 2 + 3 + 4 + 5 + 6 + ⋯ are 1, 3, 6, 10, 15, etc.The nth partial sum is given by a simple formula: = = (+). This equation was known ...

  9. Interleaved 2 of 5 - Wikipedia

    en.wikipedia.org/wiki/Interleaved_2_of_5

    Decoding Interleaved 2 of 5. Every pair of digits is color-coded, showing the code and the value for each digit. Interleaved 2 of 5 ( ITF) is a continuous two-width barcode symbology encoding digits. It is used commercially on 135 film, for ITF-14 barcodes, and on cartons of some products, while the products inside are labeled with UPC or EAN .