[seqfan] Re: Arabic Poetry Sequences

[Antti Karttunen]

On 8/25/19, Ali Sada via SeqFan <seqfan at list.seqfan.eu> wrote:
>
> Hi Everyone,
>
>
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> Please see below the "sequences" of classic Arabic poetry. Do you think they
> should be added to OEIS?
>

Do you mean those 0/1-sequences at the end of your mail? Should they
be finite or periodic? Is there any specific mathematical interest in
them?

>
>
> Best,
>
>
>
> Ali
>
>
> The "sequences" (called “buhour,” Arabic for “seas.”) were discovered in the
> 8th century by the great Iraqi scholar Al-Khalil ibn Ahmad Al-Farahidi, who
> was a linguist, philologist,cryptographer, lexicographer, musician, and
> grammarian.

See also https://en.wikipedia.org/wiki/Pingala (mentioned also by
Knuth in his Vol. 4A, chapter "History of Combinatorial Generation")
who investigated Sanskrit prosody.

I don't myself know much about Arabic poetry, but I like many Persian
ones, like this: https://www.youtube.com/watch?v=mNRnCVLERdU


Best regards,

Antti


>
>
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> The bahar (sea) has one main sequence. Sometimes these sequences get
> replaced by "lighter" versions.
>
>
>
> Each Arab poem consists of few to hundreds of verses. The verse is called
> bayt, which is Arabic for house. Each bayt could be written as a string of
> “on” and “off” type of symbols. The “on” sign means “moving,”and the “off”
> sign means “static.” The original signs used by Arabic scholars are “/” and
> “o,” so it is perfectly logical to use 1 and 0 instead.
>
>
>
> There are 28 Arabic letters, 3 of them are long vowels (“ɑ” as in bath, “u”
> as in moon, and “i” as in seen.) There are also 3 harakat (plural of haraka,
> which means movement in Arabic.) These harakat are actually short vowels (“ɛ”
> as in pet, “ʊ” as in put, and “ɪ” as in pit.)
>
>
>
> The structure of the Arabic rhythms is based on these three rules:
>
>
>
> i)                   A constant sound that is not associated with any vowel
> sound is called“saken, which means static.) It is represented by a “0.” For
> example, the “t”in the word “put” is static, and in poetry it is represented
> by a “0.”
>
> ii)                  A constant sound that is associated with a short vowel
> is considered one“moving” part. For example, the sound “p” and the sound “ʊ”
> in the word “put”are considered one moving part. So, the representation of
> the single word “put”is 10.
>
> iii)                A constant sound that is associated with a long vowel is
> considered“moving,” and the long sound is considered static. So, the
> representation ofthe word “pa” is 10.
>
>
>
>
>
> Examples:
>
> Paton= moving “p,” static “y,” moving “t,”and static “n.” 1010
>
> Josephine= moving “j,” static “o,” moving“z,” moving “f,” static “ee,” and
> static “n.” 101100
>
> Wodroow Wilson eating pizza= 1010101010101010
>
>
>
> Arabic classic buhour are:
>
>
>
> 1.       Al-Taweel-The Long
>
> 1101011010101101011011011010110101011010110110
>
>
>
> 2.       Al-Madid-The Extended
>
> 101101010110101101010110101101010110101101010110
>
> 10110101011010110101011010101101011010
>
> 101101010110101011010101101010110101011010
>
>
>
>
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> 3.       Al-Baseet-Plain
>
> 101011010110101011010110101011010110101011010110
>
> 10101101011010101101010110101101010110
>
> 1010110101101010110111010101101011010101101110
>
>
>
>
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> 4.       Al-Wafer- The Abundant
>
> 110111011011101101011010110111011011101101011010
>
> 11011101101110110101101110110111011010
>
>
>
> 5.       Al-Kamel-The Perfect
>
> 111011011101101110110111011011101101110110
>
>
>
> 6.       Al-Hazaj- The Lilt
>
> 110101011010101101010110101011010101101010
>
> 1101010110101011010101101010
>
>
>
> 7.       Al-Rajaz- The Wind Vibration
>
> 101011010101101010110101011010101101010110
>
> 1010110101011010101101010110
>
>
>
> 8.       Al-Raml- The Sand
>
> 101101010110101011010101101010110101011010
>
>
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>
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> 9.       Al-Saree’-The Fast
>
> 10101101010110101101010110101011010110
>
>
>
>
>
> 10.   Al-Munsareh- TheSloping (water goes down on a slope)
>
> 10101101011011011101010110101101101110
>
> 10101101011011010110101101
>
>
>
>
>
> 11.   Al-Khafif- The Light(light weight)
>
> 101101010101101011010101101010101101011010
>
>
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> 12.   Al-Mudhare’- TheSimilar
>
> 110101010110101101010110101010110101101010
>
> 1101010101101011010101011010
>
>
>
>
>
> 13.   Al-Muqtadhab- The Brief
>
> 101010110101101010110101010110101101010110
>
> 1010101101011010101011010110
>
>
>
> 14.   Al-Mujtath- TheDeducted
>
> 101011010110101011010101011010110101011010
>
> 1010110101101010101101011010
>
>
>
>
>
> 15.   Al-Mutaqareb- TheConverged
>
> 1101011010110101101011010110101101011010
>
> 1101011010110101101011010110101101011010
>
>
>
>
>
> 16.   Al-Khabab- The Trot
>
> 10101010101010101010101010101010
>
> 101101011010110101101011010110
>
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>