Question 1 In this exercise use the transformation rules given in the picture uploaded, to verify that the following are formulas of quantified relational logic. (a) Ba (b) ¬Bb (c) ∃x¬Bx (d) ∃x(Rx ∧ ¬Bx) (e) ¬∀x(Rx → Bx) (f) ((Rb ∧ ¬Bb) → ∃x(Rx ∧ ¬Bx)) (The image shows rules and formulas if your not familiar with this)
Question 1 In this exercise use the transformation rules given in the picture uploaded, to verify that the following are formulas of quantified relational logic. (a) Ba (b) ¬Bb (c) ∃x¬Bx (d) ∃x(Rx ∧ ¬Bx) (e) ¬∀x(Rx → Bx) (f) ((Rb ∧ ¬Bb) → ∃x(Rx ∧ ¬Bx)) (The image shows rules and formulas if your not familiar with this)
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Question 1
In this exercise use the transformation rules given in the picture uploaded, to verify
that the following are formulas of quantified relational logic.
(a) Ba
(b) ¬Bb
(c) ∃x¬Bx
In this exercise use the transformation rules given in the picture uploaded, to verify
that the following are formulas of quantified relational logic.
(a) Ba
(b) ¬Bb
(c) ∃x¬Bx
(d) ∃x(Rx ∧ ¬Bx)
(e) ¬∀x(Rx → Bx)
(f) ((Rb ∧ ¬Bb) → ∃x(Rx ∧ ¬Bx))
(e) ¬∀x(Rx → Bx)
(f) ((Rb ∧ ¬Bb) → ∃x(Rx ∧ ¬Bx))
(The image shows rules and formulas if your not familiar with this)

Transcribed Image Text:We are now in a position do describe quantified relational logic
for one or two place relations only. Remember that to specify a
logic I need to tell you (1) the formal symbols, (2) the
transformation rules, and (3) closure condition.
The formal symbols are:
· a, b, c, . . . , m, n, . . . as constant symbols for terms. A term is
anything in a theory or language that can be given a proper
name or an object that can be identified uniquely.
- x, y, z as symbols for variables, which range over terms.
- Upper case letters P, Q, R, S, T, . . . , A, B, C, D, . . . , M, . . . of
alphabet as symbols for relations (on two place
the
only).
- Truth-functional connectives: V, ^, , , ↔
- Quantifiers: V
- Brackets: ( for left bracket and ) for right bracket.
In order to talk about formulas at a meta-level we use the
symbols F, G and H.
The transformation rules for quantified relational logic are:
1. For any predicate symbol P and for any two place relation
symbol R, given any constants a or b or any variables x or y,
Pa, Px, Rab, Rxy are formulas. In Px and Rxy formulas, x and
y are said to "free" variables because there are no quantifiers to
which they are bound.
2. If F is a formula by Rule 1 and if x is a free variable in F, then
3x F is a formula and Vx F is a formula. Rule 2 is known as
binding any free variable x in F by a quantifier.
A formula F formed by either rule 1 and 2 is called an atomic
formula.
3. If F and G are atomic formulas, then -F, (F v G), (F ^ G),
· G) and (F ↔ G) are complex formulas.
(F
4. If H is a complex formula, then the result of binding any free
variable in H is a formula.
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