(i) Between any two distinct rational numbers, there are infinitely many irrationals. (ii) There is a bijection from the middle-thirds Cantor set C to R+. (iii) If A is uncountable, than A~ R. Recall that A B means that there is a bijection f A → B. (iv) Every non-empty SCR that is bounded from below has a greatest lower bound. (v) For some fixed universal set U, the relation is a partial order on P(U). Recall that A B means that there is an injection f : A → B. (vi) There is a bijection R → R2, where R2 = R x R is the usual Euclidean plane.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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True or false. (no justification needed)

(i) Between any two distinct rational numbers, there are infinitely many irrationals.
(ii) There is a bijection from the middle-thirds Cantor set C to R+.
(iii) If A is uncountable, than A~ R.
Recall that A B means that there is a bijection f A → B.
(iv) Every non-empty SCR that is bounded from below has a greatest lower bound.
(v) For some fixed universal set U, the relation is a partial order on P(U).
Recall that A B means that there is an injection f : A → B.
(vi) There is a bijection R → R2, where R2 = R x R is the usual Euclidean plane.
Transcribed Image Text:(i) Between any two distinct rational numbers, there are infinitely many irrationals. (ii) There is a bijection from the middle-thirds Cantor set C to R+. (iii) If A is uncountable, than A~ R. Recall that A B means that there is a bijection f A → B. (iv) Every non-empty SCR that is bounded from below has a greatest lower bound. (v) For some fixed universal set U, the relation is a partial order on P(U). Recall that A B means that there is an injection f : A → B. (vi) There is a bijection R → R2, where R2 = R x R is the usual Euclidean plane.
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