4. Suppose X and Y are normed spaces, dim Y <0, f:X→Y is linear and f(x) = Y. If ker(f) is closed. Prove that f is continuous. G S

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4. Suppose X and Y are normed spaces, dim Y < , f:X → Y is linear and f(X) = Y . If ker(f)
is closed. Prove that f is continuous.
ري فرحان
Transcribed Image Text:4. Suppose X and Y are normed spaces, dim Y < , f:X → Y is linear and f(X) = Y . If ker(f) is closed. Prove that f is continuous. ري فرحان
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