Haiku third lines end-rhymed. Yasuda considered that haiku translated into English should utilize all of the poetic resources of the language. Yasuda's theory also includes the concept of a "haiku moment" based in personal experience, and provides the motive for writing a haiku (' an aesthestic moment' of a timeless feeling of enlightened harmony as the poet's nature and the environment are unified'). This notion of the haiku moment has resonated with haiku writers in English, even though the notion is not widely promoted in Japanese haiku.(See however, 'Shiki's Haiku Moments for Us Today' In 1958, "An Introduction to Haiku: An
Invariant of a binary form for the ring of covariants. showed that the ring of invariants of a degree 8 form is generated by 9 invariants of degrees 2, 3, 4, 5, 6, 7, 8, 9, 10, and the ring of covariants is generated by 69 covariants. August von Gall () and confirmed the generators for the ring of invariants and showed that the ideal of relations between them is generated by elements of degrees 16, 17, 18, 19, 20. showed that the algebra of invariants of a degree 9 form is generated by 92 invariants. Cröni, Hagedorn, and Brouwer computed 476 covariants, and Lercier