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The best alloy blades are rather faithful reproductions of real swords with authentic weight and shape along with similarly high-quality finish and fittings. [2] Iaitō may even have a mock hamon ( 刃文 , lit., blade pattern , the temper line of a tempered steel blade) .
Shinken, a katana used in sword-related martial arts practice. Shinken (真剣, literally meaning "real sword") is a Japanese sword that has a forged and sharpened blade. The term shinken is often used in contrast with bokken (wooden sword), shinai (bamboo sword), and iaitō (unsharpened metal sword).
The exact origin of the Muramasa school is unknown. The oldest extant sword equipped with both a name sign Muramasa and a date sign shows the year Bunki 1 (1501). [4] [7] [8] Scholars, however, assert several swords signed with Muramasa (but without year signs) are slightly older than 1501 in light of their styles.
Archaeological excavations dated the oldest sword in Japan from at least as early as second century B.C. [2]: 4 The Kojiki (Record of Ancient Matters) and the Nihon Shoki (History of Japan), ancient texts on early Japanese history and myth that were compiled in the eighth century A.D., describe iron swords and swordsmanship that pre-date recorded history, attributed to the mythological age of ...
However, on the 196 BC Rosetta Stone, it is referenced as the "sword" determinative in a hieroglyph block, with the spelled letters of kh, p, and sh to say: Shall be set up a statue ..., the Avenger of Baq-t -(Egypt), the interpretation whereof is ' Ptolemy , the strong one of Kam-t '-(Egypt), and a statue of the god of the city, giving to him ...
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The conjugate transpose of a matrix with real entries reduces to the transpose of , as the conjugate of a real number is the number itself. The conjugate transpose can be motivated by noting that complex numbers can be usefully represented by 2 × 2 {\displaystyle 2\times 2} real matrices, obeying matrix addition and multiplication:
Hokushin Ittō-ryū is also one of the remaining ryūha which still practices kumitachi with bokuto (wooden swords). [clarification needed] The habiki kata is practiced using habiki (real swords with the sharp edge removed). [5] Hokushin Ittō-ryū also includes Iaijutsu (Hokushin-ryū iai (北辰流居合)). Today only a few teachers know the ...