
isaq ibn all-ahdab

itzak bayne shlomo ibn all-ahdab (yaa ibn all-hadib) bayne zaddik haa-sefardi (, see. 1350-see. 1426) ack yahudi ganitshastri, khagolshastri aur kavi they.
ibn all-ahdab kaa janm castille mein ack pramukh yahudi parivaar mein huaa thaa. vaha collon key asher bayne yehiyal key prapautra, juda bayne asher dwiteeya kaa chhaatr thaa, joe 1391 key yahudi virodhi narsamhar mein maaraa gayaa thaa. 1396 taka ibn all-ahdab spen seey bhaag gayaa thaa aur sisili mein thaa, jahan vaha 1426 key aspas apani mrityu taka (sirakus aur palermo mein) rahata thaa.
kaam karate hain.
unhone maghrebi key ganitshastri ibn all-banna key beejganit kaa adhyayan kiya aur ibn all-banna key 13veen shatabdi key granth "talkish amal all-hisab" ("ganana key sanchaalan kaa saransh") parr ack anuvaad aur vistrit tippani "sankhya kaa patra" prakaashit kiya. yeh kaam vyaapak beejganitiya siddhanton aur sanchaalan koo shamil karane vaalaa pahala gyaat hibru-bhasha granth honey key naate ullekhaniya haye.
unake khagoliya karyon mein shamil hain "orah selulah (oopar uthaaya gayaa maarg)", soorya aur chandrama key sanyojan aur virodh key liye hibru mein taalikaon kaa ack samooh, "kellie hemdah (keemati upkaran)", joe unake apane aavishkaar key ack advitiya bhoomadhya rekha kaa varnan kartaa haye, joe saikil key tolemic siddhant parr kaam kartaa haye ", aur" kellie memotsa (madhyavarti upkaran) ", joe unake apane design key ack anya advitiya upkaran, ack sanyojan astrolab-quadrant kaa varnan kartaa haye."bernard aar. goldstein ney 1987 mein "kellie hemdah" kaa aanshik anuvaad prakaashit kiya. "orah selulah" 25 mss mein, "kellie hemdah" 15 mss mein aur "kellie memotsa" 1 ms mein jeevit haye. 
way "pesach doros" ("baad kii peedhiyon kaa pasav") sheershak seey aur 2000 mein mekhon bett aharon aeye-yishrael dwara mudrit, pasav haggadah parr ack tippani key lekhak hain.
"leshon haa-zahav (sunhara bhasha)", ibrani bible mein paaee jaane vaali ikaaiyon aur maapon key naamon kaa ack spashteekaran.
vaha shayed mammonides key "maheene key pavitrikaran key niyamon" parr ack tippani key lekhak hain, joe "leshon haa-zahav" key samaan ms mein paaya jaataa haye, jisamen koee lekhak naheen diyaa gayaa haye.
unhone "shirei rabbinu itzak bayne shlomo ibn all-ahdab" (1987) key roop mein prakaashit geet bhee likhe. unhein "shir haa-shirim" naamak ack kriti kii rachana karane key liye jaanaa jaataa haye, lekin yeh bachee naheen haye.

