Вспомогательные предложения
ОПРЕДЕЛЕНИЕ 2.1 [2]. Система элементов ![](data:image/png;base64,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) , ![](data:image/png;base64,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) называется
базисом гильбертова пространства , если каждый элемент ![](data:image/png;base64,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) представим единственным образом в виде сходящегося ряда
![](data:image/png;base64,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) . (2.1)
Если, кроме того, выполняются равенства
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADgAAAALCAYAAAAqaE4dAAAACXBIWXMAAA6uAAAORgE18djuAAAD7UlEQVR4nN2Ve0yVdRjHPwfO8MA5Z5wDotwRKJHLgVBgRRC4ycVjlghhpcFmphltTRoDVw6yLTExV1mu26iBKbrMhdiMhhh5AZkoF1FELimQwBEOwYHD5ZwOLwYtYeAf9off7d3ze37vc/l+9/x+7ys2GAxGTCj++l1qnDeQGruEh4n0bYlsSMtF5Sh9qH3+gVgk6id3136WJW0n6n9ounvfEcp/+JgvLMPYol4257xxnoezMinpFTNP6kHWe5uxMRfNmif+q+5XKswWk+gwJa6hph6ZdJiyC9fxDY/Gz0UxJxJ9Hc30YInmaiV1WhnxcZFYTcPBKyCQI0cr4AEEGo0yHNyVhLokYNd5fc554u6OVlPikwIRo6GXwx/txjoohvK8YgLCFpP71TH27tw4a6HeW7/x5be1+HnDxVYZC2/nUxoQjtrT/L5YhdKGAY2eu2NGYQrdzRfJzTtJz5B+MsbOLZjkTWsmp1RR9DlV5n64XivCSr11TtMTBEospXRptILT33iB81oVKWM3uewfzVKnLs5e1s9SYgKFnxXivzmV7oIcwtam0fpN8YyxOt2QYCVmEySlSkeejghjcHQqRqpwmnyPppb8k71k7NmKtiSHg+UNRLo9MTeBDkuX41BURLsuCoXcmuGOcxT9pAEPM3ILGol/M4OzJtKn/pBiobuNbL4zTVVdvHXgHcyrf+RM6yKS1waxwHUe9T8fp6FyjCDbAuocV5OgaGHPznxsnBdypUlE9vtbhJNyp60JB69F0x7fmaDvb6Pq9184c6qa5W+8LtzjwhtiZKPtSJTONF+5w8YdL1N28BAWCxy5dHWAvhE3xEaJJ89G2XK6tAx1RAhZb5uRkbmDwJAoXliXzuP2clpaFGhapbwSZMHpdieCfQyI9IO0NbZglHsJBGJTMhjZm0mlqxJ711BejAk2XUot9oo+Bqyfwt6uDb1pcrrOGkrO60hIWjVJ3tI0rdAIp5nV2fqRnppIdXMPCSnZhCyR82ePlN4GMXFhPhTWKgnzNzI2aoWj7SA3Je64Od7g6DUJ4vF8VeR6ZDVltN0dQuXjTMBjsayPj2O+RPiD0NNhJCE+Et25Y8TGBHHik0NIKsJR+a4k0NdXiBn/CLh7+7DKPxT1Cu+JPbkRw4A9EQEu5JbmUXdrNZam66De9BIO8nlzH58JHgERpmfK7+q04PnnItBeOmGyMSZOBQzX+zGiURAb7c332ftR6H0mBI7DXRV+j6iCbR+kjq8miwWue21i4Zky4ed8Ny0J35Wv4vsvX2SmIHl7mrD+8NO8e7srHkjYTFCtSUIlNP0PJ/Uzgtl14LhgxfenPlp45AX+DVAnVD6Xc+YAAAAAAElFTkSuQmCC) , ![](data:image/png;base64,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) (2.2)
то базис ![](data:image/png;base64,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) называется ортонормальным (или ортонормированным).
Примером ортонормированного базиса в вещественном пространстве ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB4AAAALCAYAAABoKz2KAAAACXBIWXMAAA7kAAAORgGbMvHkAAAC70lEQVR4nMWUa0zNcRjHPzr/zp9TnG5OKsMpqUQcKnKyOkToVC61MYpeiDFb88IwzMy8MG/cxlx2igxrc5nLG8Jcw7RyluuEbqdTjlLn1nYuzv7ZYrF5Y75vnt/veb6/5/v8nj2/n+DxeLz8BGfPO/IS42mIKab+5inCFAL/AlLWyl2LufJFx8lDZQSPmMDNV60Yqp5IBFeviTNnK9HklJKktLB95wG6e+yM069lW6FW4pjfPOT0xcu0fWpHMW05+zflDhJy27s4f8xASF4RaWpVv3CQaiqLs/QEC17c3Y1sWL+dyPGzaO5zYKqtpi9ch2askrrKffhp13NU52LdFgPv56cTq/QSNiaRsh3puD/eZ+P+B5id6dRfv47Z8UNVEUrWPB1Lixew51gFl6as6xduaG9n4dJREscvMJwtu3fjQmS0QsFV41PGzM2WYs3vW5ioV+OvshIjs2F1+pxKkCmCUfiWj2qfkZadje11PdbOt3RGLaH3uYGUnI0MF+WIQgT2zg7OH69CGNJV56swjsggkW/mFvzDRjM+Pn6gR14XAUNFn7HhLwqYLV1g68PiFpHLB2gv75bTOCyF1YuSGea1UXP1OfqSUC5UjyU1KZZAUeZrdz/X0WtFaHzxmFZxKB/q7nH7mpGSvZt91Q/MW7hKTYupkyGxMUyZM4+KcxVctihxJWag6nvG4SNtFGfIOXirnTX6BG5fuMikDA01TgeFXz/z0eOm7nUTWdOjcbkc9HicjNQkInhDJ7IipRtTh5UZBflEyn4ZcpLTMim/U4tdG0PEzFVsc12j8VsAW3PTsBpvYJcpccpDyE+Nx9JhIiAqgagRgRQtX4lfUAirF3iIi42QcrUZH5MwexlFukyEaE0m0Zo/j31QdCr5piZOGKooLSkkKT2XpB8xc5ia0rXJ0lDmxU3/5VzK1H6bmaOTrLG6kprWSDatzEDhu9xfPVK1toAy7WB/uCTmHRz4DSbPXcXkn/b/5nf4C/w34e8zTAQTzOw8uQAAAABJRU5ErkJggg==) является тригонометрическая система
![](data:image/png;base64,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) (2.3)
Пусть ![](data:image/png;base64,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) - произвольный ортонормированный базис пространства и -некоторый линейный ограниченный обратимый оператор. Тогда для любого вектора ![](data:image/png;base64,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)
![](data:image/png;base64,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) ,
и следовательно,
![](data:image/png;base64,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) ,
где
![](data:image/png;base64,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) , ![](data:image/png;base64,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) , ![](data:image/png;base64,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) . (2.4)
Очевидно,
![](data:image/png;base64,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) , (![](data:image/png;base64,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) ).
Поэтому, если
![](data:image/png;base64,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) , (2.5)
то
![](data:image/png;base64,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) , ![](data:image/png;base64,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)
т.е. разложение (2.5) единственно.
Таким образом, всякий ограниченный обратимый оператор преобразует любой ортонормированный базис в некоторый другой базис пространства Базис ![](data:image/png;base64,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) , ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACMAAAALCAYAAAD1JjQCAAAACXBIWXMAAA7YAAAORgHoijYyAAACUElEQVR4nGP59+/ff4ZBAlgY/n9j2L5wPYOsqweDjrQwWYY8uXCK4Y+cHoOCEAdc7OOjCwzLtx5l4JM3ZPB3t2bgZibsZxYGRi6G+08uMbB9cWPQIdUVQI8c2riAob11G0PJhiUMCgwQx/z59ZZh59HrDF4+7gzTq2sZuGQUGAL0pIhwDNBARgZWBhnGFwxl1X0MYWkVDCby/GDJr28eMhw7eQHM/vYHokFQSoPBzlQdwgF6RMM6lMHV4AKqoWzCDGGRkWDHSoiLMPCysxLlN5Y/ry8ynL74g+Erx0YG97giuENAgJ2Ph0FAVBLMFoCKcQvyMnz9ywgPdjFRUZyGn9gyk0HCKYHBWR23GhTHPDh7lIFfX4zh3pV3DB6RTAxffv5j4GFnAkt+enqP4cD2DQxvviPiW0HPlSFOURqnga8e3mPgklBguHtsKcM9ZnMGP2tVhg9fPzP8evMaLA4y+8PTuwzfOCUY+P+9YfjIJMLA9f0Fw4dn74COufefwS8iieHjtnaG+au3M5QmR8AdI6RoylBab4rFSqjjQIl/2RyGE0/uMlxs72PgzItkONHdz2BWWcmwbPoWBl4lJYazWzYyOKaGM9ybNYPBuHY2g7XUf4YLO+Yy3JNLZtB4uZ7hjIADg8a1xQxH5+9iYHHJLoUYnNfLEEBUYCIBYJrxjM4DYxB4d/80wx0LPwZDeSUGm1Ur4co+P7vG8M7Ej8FAHMJ3SG5jcACzShisQJSPCYNbGSgBUxGAQjIuGcRCzca8UlpAcS0McXRAVcdQCgaVYwCWjLjxd+o3ZgAAAABJRU5ErkJggg==) пространства , получаемый из ортонормированного базиса с помощью такого преобразования, называется базисом, эквивалентным ортонормированному (по терминологии Н.К.Бари [4] –базисом Рисса).
В теории Лебега ряд Фурье может быть определен для данной функции ![](data:image/png;base64,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) , если эта функция интегрируема по Лебегу. В последующих рассуждениях предполагается, что ![](data:image/png;base64,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) интегрируема по Лебегу.
Достарыңызбен бөлісу: |