ũ (1ܰ) þ âǼ A. ڸŰ 쳽 ϰ̴. å 216 Ƿ ִµ ʱ 꿡 ̵ ġ, ɰ , Ǯ ֻ ̳ ѸǾ ִ. غ Ͱ ڵ , ̾ð ͼ ϳ Űܰ ǮԲ ɰ ̸ Ѵ. ϰ Ǯ ؾ Ǯ ִ ġؼ ġ ϵ ش. ߰߰ ռ ϰ ܼ ع ϴ , ٸ ؾ Ǯ Ʈ ϰ ־ 㸦 Ӹ ϰ ش.
2 ø ʱ شϴ å Ǹ ϴ ̶ , Ʋ Ǯ ̸ ̴. ø Ѵٸ Ǯ ְ ǰ tvN α { } غ ְ ȴ. Ǯ̷ б п ̿ ûҳ, γ ȸ ӵ âǼ ̰ ; ϴ л, γ ϰ ̴ ̵ α γ ȣ Ѵ.
(Boris A. Kordemsky)
A. ڸŰ þ âǼ ȭ 弭 ȸ å ڴ. ũ ( MѬ֬ެѬڬ֬ܬѬ Cެ֬ܬѬݬܬѡ) 1954 ó ⰣǾ ҷ ü þƿ 鸸 ΰ ǸŵǾ ⸦ ŵ ִ. ũ̳, Ұƾ, 밡, üھ, , Ͼ, , ߱, Ϻ, (The Moscow Puzzles, ƾ ) Ǿ. ڸŰ 1956 ڻ ũ б 뿡 ƴ. Ⱓ <б?Mathematics in School> ִ Į ؿԴµ л ƴ϶ Ե鿡Ա ſ αⰡ Ұ Լ ȰǾ.
, , ȣص, ̵ ġ, ֻ ̳, ɰ , Ҽ , ߸, ũν, 츮 γ ߴִ 뼺Ǿ ִ å ƾ ʴ پ ϰǡ̶ ߴ. å þ б ū ȹ .