Exercise 6.65. Prove that if E₁ CR and E₂ C Rm are convex, then E = E₁ × E2 is a convex subset of Rn+m. Hence the Cartesian product of n intervals in R is a convex subset of Rn.

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Chapter6: Vector Spaces
Section6.5: The Kernel And Range Of A Linear Transformation
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e exercise.
Exercise 6.65. Prove that if E₁ C Rn and E₂ C Rm are convex, then E = E₁ × E2 is
a convex subset of Rn+m. Hence the Cartesian product of n intervals in R is a convex
subset of R.
It follows from Theorem 6.62 that every closed and bounded interval in R is connected.
More generally,
Transcribed Image Text:e exercise. Exercise 6.65. Prove that if E₁ C Rn and E₂ C Rm are convex, then E = E₁ × E2 is a convex subset of Rn+m. Hence the Cartesian product of n intervals in R is a convex subset of R. It follows from Theorem 6.62 that every closed and bounded interval in R is connected. More generally,
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