P. 96 of Theorem List - Intuitionistic Logic Explorer

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**Theorem List for Intuitionistic Logic Explorer -** 9501-9600 *Has distinct variable group(s)
Type	Label	Description
Statement

Theorem	nummac 9501	Perform a multiply-add of two decimal integers 𝑀 and 𝑁 against a fixed multiplicand 𝑃 (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
⊢ 𝑇 ∈ ℕ₀ & ⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝐶 ∈ ℕ₀ & ⊢ 𝐷 ∈ ℕ₀ & ⊢ 𝑀 = ((𝑇 · 𝐴) + 𝐵) & ⊢ 𝑁 = ((𝑇 · 𝐶) + 𝐷) & ⊢ 𝑃 ∈ ℕ₀ & ⊢ 𝐹 ∈ ℕ₀ & ⊢ 𝐺 ∈ ℕ₀ & ⊢ ((𝐴 · 𝑃) + (𝐶 + 𝐺)) = 𝐸 & ⊢ ((𝐵 · 𝑃) + 𝐷) = ((𝑇 · 𝐺) + 𝐹) ⇒ ⊢ ((𝑀 · 𝑃) + 𝑁) = ((𝑇 · 𝐸) + 𝐹)

Theorem	numma2c 9502	Perform a multiply-add of two decimal integers 𝑀 and 𝑁 against a fixed multiplicand 𝑃 (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
⊢ 𝑇 ∈ ℕ₀ & ⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝐶 ∈ ℕ₀ & ⊢ 𝐷 ∈ ℕ₀ & ⊢ 𝑀 = ((𝑇 · 𝐴) + 𝐵) & ⊢ 𝑁 = ((𝑇 · 𝐶) + 𝐷) & ⊢ 𝑃 ∈ ℕ₀ & ⊢ 𝐹 ∈ ℕ₀ & ⊢ 𝐺 ∈ ℕ₀ & ⊢ ((𝑃 · 𝐴) + (𝐶 + 𝐺)) = 𝐸 & ⊢ ((𝑃 · 𝐵) + 𝐷) = ((𝑇 · 𝐺) + 𝐹) ⇒ ⊢ ((𝑃 · 𝑀) + 𝑁) = ((𝑇 · 𝐸) + 𝐹)

Theorem	numadd 9503	Add two decimal integers 𝑀 and 𝑁 (no carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
⊢ 𝑇 ∈ ℕ₀ & ⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝐶 ∈ ℕ₀ & ⊢ 𝐷 ∈ ℕ₀ & ⊢ 𝑀 = ((𝑇 · 𝐴) + 𝐵) & ⊢ 𝑁 = ((𝑇 · 𝐶) + 𝐷) & ⊢ (𝐴 + 𝐶) = 𝐸 & ⊢ (𝐵 + 𝐷) = 𝐹 ⇒ ⊢ (𝑀 + 𝑁) = ((𝑇 · 𝐸) + 𝐹)

Theorem	numaddc 9504	Add two decimal integers 𝑀 and 𝑁 (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
⊢ 𝑇 ∈ ℕ₀ & ⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝐶 ∈ ℕ₀ & ⊢ 𝐷 ∈ ℕ₀ & ⊢ 𝑀 = ((𝑇 · 𝐴) + 𝐵) & ⊢ 𝑁 = ((𝑇 · 𝐶) + 𝐷) & ⊢ 𝐹 ∈ ℕ₀ & ⊢ ((𝐴 + 𝐶) + 1) = 𝐸 & ⊢ (𝐵 + 𝐷) = ((𝑇 · 1) + 𝐹) ⇒ ⊢ (𝑀 + 𝑁) = ((𝑇 · 𝐸) + 𝐹)

Theorem	nummul1c 9505	The product of a decimal integer with a number. (Contributed by Mario Carneiro, 18-Feb-2014.)
⊢ 𝑇 ∈ ℕ₀ & ⊢ 𝑃 ∈ ℕ₀ & ⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝑁 = ((𝑇 · 𝐴) + 𝐵) & ⊢ 𝐷 ∈ ℕ₀ & ⊢ 𝐸 ∈ ℕ₀ & ⊢ ((𝐴 · 𝑃) + 𝐸) = 𝐶 & ⊢ (𝐵 · 𝑃) = ((𝑇 · 𝐸) + 𝐷) ⇒ ⊢ (𝑁 · 𝑃) = ((𝑇 · 𝐶) + 𝐷)

Theorem	nummul2c 9506	The product of a decimal integer with a number (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
⊢ 𝑇 ∈ ℕ₀ & ⊢ 𝑃 ∈ ℕ₀ & ⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝑁 = ((𝑇 · 𝐴) + 𝐵) & ⊢ 𝐷 ∈ ℕ₀ & ⊢ 𝐸 ∈ ℕ₀ & ⊢ ((𝑃 · 𝐴) + 𝐸) = 𝐶 & ⊢ (𝑃 · 𝐵) = ((𝑇 · 𝐸) + 𝐷) ⇒ ⊢ (𝑃 · 𝑁) = ((𝑇 · 𝐶) + 𝐷)

Theorem	decma 9507	Perform a multiply-add of two numerals 𝑀 and 𝑁 against a fixed multiplicand 𝑃 (no carry). (Contributed by Mario Carneiro, 18-Feb-2014.) (Revised by AV, 6-Sep-2021.)
⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝐶 ∈ ℕ₀ & ⊢ 𝐷 ∈ ℕ₀ & ⊢ 𝑀 = ;𝐴𝐵 & ⊢ 𝑁 = ;𝐶𝐷 & ⊢ 𝑃 ∈ ℕ₀ & ⊢ ((𝐴 · 𝑃) + 𝐶) = 𝐸 & ⊢ ((𝐵 · 𝑃) + 𝐷) = 𝐹 ⇒ ⊢ ((𝑀 · 𝑃) + 𝑁) = ;𝐸𝐹

Theorem	decmac 9508	Perform a multiply-add of two numerals 𝑀 and 𝑁 against a fixed multiplicand 𝑃 (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.) (Revised by AV, 6-Sep-2021.)
⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝐶 ∈ ℕ₀ & ⊢ 𝐷 ∈ ℕ₀ & ⊢ 𝑀 = ;𝐴𝐵 & ⊢ 𝑁 = ;𝐶𝐷 & ⊢ 𝑃 ∈ ℕ₀ & ⊢ 𝐹 ∈ ℕ₀ & ⊢ 𝐺 ∈ ℕ₀ & ⊢ ((𝐴 · 𝑃) + (𝐶 + 𝐺)) = 𝐸 & ⊢ ((𝐵 · 𝑃) + 𝐷) = ;𝐺𝐹 ⇒ ⊢ ((𝑀 · 𝑃) + 𝑁) = ;𝐸𝐹

Theorem	decma2c 9509	Perform a multiply-add of two numerals 𝑀 and 𝑁 against a fixed multiplier 𝑃 (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.) (Revised by AV, 6-Sep-2021.)
⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝐶 ∈ ℕ₀ & ⊢ 𝐷 ∈ ℕ₀ & ⊢ 𝑀 = ;𝐴𝐵 & ⊢ 𝑁 = ;𝐶𝐷 & ⊢ 𝑃 ∈ ℕ₀ & ⊢ 𝐹 ∈ ℕ₀ & ⊢ 𝐺 ∈ ℕ₀ & ⊢ ((𝑃 · 𝐴) + (𝐶 + 𝐺)) = 𝐸 & ⊢ ((𝑃 · 𝐵) + 𝐷) = ;𝐺𝐹 ⇒ ⊢ ((𝑃 · 𝑀) + 𝑁) = ;𝐸𝐹

Theorem	decadd 9510	Add two numerals 𝑀 and 𝑁 (no carry). (Contributed by Mario Carneiro, 18-Feb-2014.) (Revised by AV, 6-Sep-2021.)
⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝐶 ∈ ℕ₀ & ⊢ 𝐷 ∈ ℕ₀ & ⊢ 𝑀 = ;𝐴𝐵 & ⊢ 𝑁 = ;𝐶𝐷 & ⊢ (𝐴 + 𝐶) = 𝐸 & ⊢ (𝐵 + 𝐷) = 𝐹 ⇒ ⊢ (𝑀 + 𝑁) = ;𝐸𝐹

Theorem	decaddc 9511	Add two numerals 𝑀 and 𝑁 (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.) (Revised by AV, 6-Sep-2021.)
⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝐶 ∈ ℕ₀ & ⊢ 𝐷 ∈ ℕ₀ & ⊢ 𝑀 = ;𝐴𝐵 & ⊢ 𝑁 = ;𝐶𝐷 & ⊢ ((𝐴 + 𝐶) + 1) = 𝐸 & ⊢ 𝐹 ∈ ℕ₀ & ⊢ (𝐵 + 𝐷) = ;1𝐹 ⇒ ⊢ (𝑀 + 𝑁) = ;𝐸𝐹

Theorem	decaddc2 9512	Add two numerals 𝑀 and 𝑁 (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.) (Revised by AV, 6-Sep-2021.)
⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝐶 ∈ ℕ₀ & ⊢ 𝐷 ∈ ℕ₀ & ⊢ 𝑀 = ;𝐴𝐵 & ⊢ 𝑁 = ;𝐶𝐷 & ⊢ ((𝐴 + 𝐶) + 1) = 𝐸 & ⊢ (𝐵 + 𝐷) = ;10 ⇒ ⊢ (𝑀 + 𝑁) = ;𝐸0

Theorem	decrmanc 9513	Perform a multiply-add of two numerals 𝑀 and 𝑁 against a fixed multiplicand 𝑃 (no carry). (Contributed by AV, 16-Sep-2021.)
⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝑁 ∈ ℕ₀ & ⊢ 𝑀 = ;𝐴𝐵 & ⊢ 𝑃 ∈ ℕ₀ & ⊢ (𝐴 · 𝑃) = 𝐸 & ⊢ ((𝐵 · 𝑃) + 𝑁) = 𝐹 ⇒ ⊢ ((𝑀 · 𝑃) + 𝑁) = ;𝐸𝐹

Theorem	decrmac 9514	Perform a multiply-add of two numerals 𝑀 and 𝑁 against a fixed multiplicand 𝑃 (with carry). (Contributed by AV, 16-Sep-2021.)
⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝑁 ∈ ℕ₀ & ⊢ 𝑀 = ;𝐴𝐵 & ⊢ 𝑃 ∈ ℕ₀ & ⊢ 𝐹 ∈ ℕ₀ & ⊢ 𝐺 ∈ ℕ₀ & ⊢ ((𝐴 · 𝑃) + 𝐺) = 𝐸 & ⊢ ((𝐵 · 𝑃) + 𝑁) = ;𝐺𝐹 ⇒ ⊢ ((𝑀 · 𝑃) + 𝑁) = ;𝐸𝐹

Theorem	decaddm10 9515	The sum of two multiples of 10 is a multiple of 10. (Contributed by AV, 30-Jul-2021.)
⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ ⇒ ⊢ (;𝐴0 + ;𝐵0) = ;(𝐴 + 𝐵)0

Theorem	decaddi 9516	Add two numerals 𝑀 and 𝑁 (no carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝑁 ∈ ℕ₀ & ⊢ 𝑀 = ;𝐴𝐵 & ⊢ (𝐵 + 𝑁) = 𝐶 ⇒ ⊢ (𝑀 + 𝑁) = ;𝐴𝐶

Theorem	decaddci 9517	Add two numerals 𝑀 and 𝑁 (no carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝑁 ∈ ℕ₀ & ⊢ 𝑀 = ;𝐴𝐵 & ⊢ (𝐴 + 1) = 𝐷 & ⊢ 𝐶 ∈ ℕ₀ & ⊢ (𝐵 + 𝑁) = ;1𝐶 ⇒ ⊢ (𝑀 + 𝑁) = ;𝐷𝐶

Theorem	decaddci2 9518	Add two numerals 𝑀 and 𝑁 (no carry). (Contributed by Mario Carneiro, 18-Feb-2014.) (Revised by AV, 6-Sep-2021.)
⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝑁 ∈ ℕ₀ & ⊢ 𝑀 = ;𝐴𝐵 & ⊢ (𝐴 + 1) = 𝐷 & ⊢ (𝐵 + 𝑁) = ;10 ⇒ ⊢ (𝑀 + 𝑁) = ;𝐷0

Theorem	decsubi 9519	Difference between a numeral 𝑀 and a nonnegative integer 𝑁 (no underflow). (Contributed by AV, 22-Jul-2021.) (Revised by AV, 6-Sep-2021.)
⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝑁 ∈ ℕ₀ & ⊢ 𝑀 = ;𝐴𝐵 & ⊢ (𝐴 + 1) = 𝐷 & ⊢ (𝐵 − 𝑁) = 𝐶 ⇒ ⊢ (𝑀 − 𝑁) = ;𝐴𝐶

Theorem	decmul1 9520	The product of a numeral with a number (no carry). (Contributed by AV, 22-Jul-2021.) (Revised by AV, 6-Sep-2021.)
⊢ 𝑃 ∈ ℕ₀ & ⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝑁 = ;𝐴𝐵 & ⊢ 𝐷 ∈ ℕ₀ & ⊢ (𝐴 · 𝑃) = 𝐶 & ⊢ (𝐵 · 𝑃) = 𝐷 ⇒ ⊢ (𝑁 · 𝑃) = ;𝐶𝐷

Theorem	decmul1c 9521	The product of a numeral with a number (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.) (Revised by AV, 6-Sep-2021.)
⊢ 𝑃 ∈ ℕ₀ & ⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝑁 = ;𝐴𝐵 & ⊢ 𝐷 ∈ ℕ₀ & ⊢ 𝐸 ∈ ℕ₀ & ⊢ ((𝐴 · 𝑃) + 𝐸) = 𝐶 & ⊢ (𝐵 · 𝑃) = ;𝐸𝐷 ⇒ ⊢ (𝑁 · 𝑃) = ;𝐶𝐷

Theorem	decmul2c 9522	The product of a numeral with a number (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.) (Revised by AV, 6-Sep-2021.)
⊢ 𝑃 ∈ ℕ₀ & ⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝑁 = ;𝐴𝐵 & ⊢ 𝐷 ∈ ℕ₀ & ⊢ 𝐸 ∈ ℕ₀ & ⊢ ((𝑃 · 𝐴) + 𝐸) = 𝐶 & ⊢ (𝑃 · 𝐵) = ;𝐸𝐷 ⇒ ⊢ (𝑃 · 𝑁) = ;𝐶𝐷

Theorem	decmulnc 9523	The product of a numeral with a number (no carry). (Contributed by AV, 15-Jun-2021.)
⊢ 𝑁 ∈ ℕ₀ & ⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ ⇒ ⊢ (𝑁 · ;𝐴𝐵) = ;(𝑁 · 𝐴)(𝑁 · 𝐵)

Theorem	11multnc 9524	The product of 11 (as numeral) with a number (no carry). (Contributed by AV, 15-Jun-2021.)
⊢ 𝑁 ∈ ℕ₀ ⇒ ⊢ (𝑁 · ;11) = ;𝑁𝑁

Theorem	decmul10add 9525	A multiplication of a number and a numeral expressed as addition with first summand as multiple of 10. (Contributed by AV, 22-Jul-2021.) (Revised by AV, 6-Sep-2021.)
⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝑀 ∈ ℕ₀ & ⊢ 𝐸 = (𝑀 · 𝐴) & ⊢ 𝐹 = (𝑀 · 𝐵) ⇒ ⊢ (𝑀 · ;𝐴𝐵) = (;𝐸0 + 𝐹)

Theorem	6p5lem 9526	Lemma for 6p5e11 9529 and related theorems. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐷 ∈ ℕ₀ & ⊢ 𝐸 ∈ ℕ₀ & ⊢ 𝐵 = (𝐷 + 1) & ⊢ 𝐶 = (𝐸 + 1) & ⊢ (𝐴 + 𝐷) = ;1𝐸 ⇒ ⊢ (𝐴 + 𝐵) = ;1𝐶

Theorem	5p5e10 9527	5 + 5 = 10. (Contributed by NM, 5-Feb-2007.) (Revised by Stanislas Polu, 7-Apr-2020.) (Revised by AV, 6-Sep-2021.)
⊢ (5 + 5) = ;10

Theorem	6p4e10 9528	6 + 4 = 10. (Contributed by NM, 5-Feb-2007.) (Revised by Stanislas Polu, 7-Apr-2020.) (Revised by AV, 6-Sep-2021.)
⊢ (6 + 4) = ;10

Theorem	6p5e11 9529	6 + 5 = 11. (Contributed by Mario Carneiro, 19-Apr-2015.) (Revised by AV, 6-Sep-2021.)
⊢ (6 + 5) = ;11

Theorem	6p6e12 9530	6 + 6 = 12. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (6 + 6) = ;12

Theorem	7p3e10 9531	7 + 3 = 10. (Contributed by NM, 5-Feb-2007.) (Revised by Stanislas Polu, 7-Apr-2020.) (Revised by AV, 6-Sep-2021.)
⊢ (7 + 3) = ;10

Theorem	7p4e11 9532	7 + 4 = 11. (Contributed by Mario Carneiro, 19-Apr-2015.) (Revised by AV, 6-Sep-2021.)
⊢ (7 + 4) = ;11

Theorem	7p5e12 9533	7 + 5 = 12. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (7 + 5) = ;12

Theorem	7p6e13 9534	7 + 6 = 13. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (7 + 6) = ;13

Theorem	7p7e14 9535	7 + 7 = 14. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (7 + 7) = ;14

Theorem	8p2e10 9536	8 + 2 = 10. (Contributed by NM, 5-Feb-2007.) (Revised by Stanislas Polu, 7-Apr-2020.) (Revised by AV, 6-Sep-2021.)
⊢ (8 + 2) = ;10

Theorem	8p3e11 9537	8 + 3 = 11. (Contributed by Mario Carneiro, 19-Apr-2015.) (Revised by AV, 6-Sep-2021.)
⊢ (8 + 3) = ;11

Theorem	8p4e12 9538	8 + 4 = 12. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (8 + 4) = ;12

Theorem	8p5e13 9539	8 + 5 = 13. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (8 + 5) = ;13

Theorem	8p6e14 9540	8 + 6 = 14. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (8 + 6) = ;14

Theorem	8p7e15 9541	8 + 7 = 15. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (8 + 7) = ;15

Theorem	8p8e16 9542	8 + 8 = 16. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (8 + 8) = ;16

Theorem	9p2e11 9543	9 + 2 = 11. (Contributed by Mario Carneiro, 19-Apr-2015.) (Revised by AV, 6-Sep-2021.)
⊢ (9 + 2) = ;11

Theorem	9p3e12 9544	9 + 3 = 12. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (9 + 3) = ;12

Theorem	9p4e13 9545	9 + 4 = 13. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (9 + 4) = ;13

Theorem	9p5e14 9546	9 + 5 = 14. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (9 + 5) = ;14

Theorem	9p6e15 9547	9 + 6 = 15. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (9 + 6) = ;15

Theorem	9p7e16 9548	9 + 7 = 16. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (9 + 7) = ;16

Theorem	9p8e17 9549	9 + 8 = 17. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (9 + 8) = ;17

Theorem	9p9e18 9550	9 + 9 = 18. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (9 + 9) = ;18

Theorem	10p10e20 9551	10 + 10 = 20. (Contributed by Mario Carneiro, 19-Apr-2015.) (Revised by AV, 6-Sep-2021.)
⊢ (;10 + ;10) = ;20

Theorem	10m1e9 9552	10 - 1 = 9. (Contributed by AV, 6-Sep-2021.)
⊢ (;10 − 1) = 9

Theorem	4t3lem 9553	Lemma for 4t3e12 9554 and related theorems. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ 𝐴 ∈ ℕ₀ & ⊢ 𝐵 ∈ ℕ₀ & ⊢ 𝐶 = (𝐵 + 1) & ⊢ (𝐴 · 𝐵) = 𝐷 & ⊢ (𝐷 + 𝐴) = 𝐸 ⇒ ⊢ (𝐴 · 𝐶) = 𝐸

Theorem	4t3e12 9554	4 times 3 equals 12. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (4 · 3) = ;12

Theorem	4t4e16 9555	4 times 4 equals 16. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (4 · 4) = ;16

Theorem	5t2e10 9556	5 times 2 equals 10. (Contributed by NM, 5-Feb-2007.) (Revised by AV, 4-Sep-2021.)
⊢ (5 · 2) = ;10

Theorem	5t3e15 9557	5 times 3 equals 15. (Contributed by Mario Carneiro, 19-Apr-2015.) (Revised by AV, 6-Sep-2021.)
⊢ (5 · 3) = ;15

Theorem	5t4e20 9558	5 times 4 equals 20. (Contributed by Mario Carneiro, 19-Apr-2015.) (Revised by AV, 6-Sep-2021.)
⊢ (5 · 4) = ;20

Theorem	5t5e25 9559	5 times 5 equals 25. (Contributed by Mario Carneiro, 19-Apr-2015.) (Revised by AV, 6-Sep-2021.)
⊢ (5 · 5) = ;25

Theorem	6t2e12 9560	6 times 2 equals 12. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (6 · 2) = ;12

Theorem	6t3e18 9561	6 times 3 equals 18. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (6 · 3) = ;18

Theorem	6t4e24 9562	6 times 4 equals 24. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (6 · 4) = ;24

Theorem	6t5e30 9563	6 times 5 equals 30. (Contributed by Mario Carneiro, 19-Apr-2015.) (Revised by AV, 6-Sep-2021.)
⊢ (6 · 5) = ;30

Theorem	6t6e36 9564	6 times 6 equals 36. (Contributed by Mario Carneiro, 19-Apr-2015.) (Revised by AV, 6-Sep-2021.)
⊢ (6 · 6) = ;36

Theorem	7t2e14 9565	7 times 2 equals 14. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (7 · 2) = ;14

Theorem	7t3e21 9566	7 times 3 equals 21. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (7 · 3) = ;21

Theorem	7t4e28 9567	7 times 4 equals 28. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (7 · 4) = ;28

Theorem	7t5e35 9568	7 times 5 equals 35. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (7 · 5) = ;35

Theorem	7t6e42 9569	7 times 6 equals 42. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (7 · 6) = ;42

Theorem	7t7e49 9570	7 times 7 equals 49. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (7 · 7) = ;49

Theorem	8t2e16 9571	8 times 2 equals 16. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (8 · 2) = ;16

Theorem	8t3e24 9572	8 times 3 equals 24. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (8 · 3) = ;24

Theorem	8t4e32 9573	8 times 4 equals 32. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (8 · 4) = ;32

Theorem	8t5e40 9574	8 times 5 equals 40. (Contributed by Mario Carneiro, 19-Apr-2015.) (Revised by AV, 6-Sep-2021.)
⊢ (8 · 5) = ;40

Theorem	8t6e48 9575	8 times 6 equals 48. (Contributed by Mario Carneiro, 19-Apr-2015.) (Revised by AV, 6-Sep-2021.)
⊢ (8 · 6) = ;48

Theorem	8t7e56 9576	8 times 7 equals 56. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (8 · 7) = ;56

Theorem	8t8e64 9577	8 times 8 equals 64. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (8 · 8) = ;64

Theorem	9t2e18 9578	9 times 2 equals 18. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (9 · 2) = ;18

Theorem	9t3e27 9579	9 times 3 equals 27. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (9 · 3) = ;27

Theorem	9t4e36 9580	9 times 4 equals 36. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (9 · 4) = ;36

Theorem	9t5e45 9581	9 times 5 equals 45. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (9 · 5) = ;45

Theorem	9t6e54 9582	9 times 6 equals 54. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (9 · 6) = ;54

Theorem	9t7e63 9583	9 times 7 equals 63. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (9 · 7) = ;63

Theorem	9t8e72 9584	9 times 8 equals 72. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (9 · 8) = ;72

Theorem	9t9e81 9585	9 times 9 equals 81. (Contributed by Mario Carneiro, 19-Apr-2015.)
⊢ (9 · 9) = ;81

Theorem	9t11e99 9586	9 times 11 equals 99. (Contributed by AV, 14-Jun-2021.) (Revised by AV, 6-Sep-2021.)
⊢ (9 · ;11) = ;99

Theorem	9lt10 9587	9 is less than 10. (Contributed by Mario Carneiro, 8-Feb-2015.) (Revised by AV, 8-Sep-2021.)
⊢ 9 < ;10

Theorem	8lt10 9588	8 is less than 10. (Contributed by Mario Carneiro, 8-Feb-2015.) (Revised by AV, 8-Sep-2021.)
⊢ 8 < ;10

Theorem	7lt10 9589	7 is less than 10. (Contributed by Mario Carneiro, 10-Mar-2015.) (Revised by AV, 8-Sep-2021.)
⊢ 7 < ;10

Theorem	6lt10 9590	6 is less than 10. (Contributed by Mario Carneiro, 10-Mar-2015.) (Revised by AV, 8-Sep-2021.)
⊢ 6 < ;10

Theorem	5lt10 9591	5 is less than 10. (Contributed by Mario Carneiro, 10-Mar-2015.) (Revised by AV, 8-Sep-2021.)
⊢ 5 < ;10

Theorem	4lt10 9592	4 is less than 10. (Contributed by Mario Carneiro, 10-Mar-2015.) (Revised by AV, 8-Sep-2021.)
⊢ 4 < ;10

Theorem	3lt10 9593	3 is less than 10. (Contributed by Mario Carneiro, 10-Mar-2015.) (Revised by AV, 8-Sep-2021.)
⊢ 3 < ;10

Theorem	2lt10 9594	2 is less than 10. (Contributed by Mario Carneiro, 10-Mar-2015.) (Revised by AV, 8-Sep-2021.)
⊢ 2 < ;10

Theorem	1lt10 9595	1 is less than 10. (Contributed by NM, 7-Nov-2012.) (Revised by Mario Carneiro, 9-Mar-2015.) (Revised by AV, 8-Sep-2021.)
⊢ 1 < ;10

Theorem	decbin0 9596	Decompose base 4 into base 2. (Contributed by Mario Carneiro, 18-Feb-2014.)
⊢ 𝐴 ∈ ℕ₀ ⇒ ⊢ (4 · 𝐴) = (2 · (2 · 𝐴))

Theorem	decbin2 9597	Decompose base 4 into base 2. (Contributed by Mario Carneiro, 18-Feb-2014.)
⊢ 𝐴 ∈ ℕ₀ ⇒ ⊢ ((4 · 𝐴) + 2) = (2 · ((2 · 𝐴) + 1))

Theorem	decbin3 9598	Decompose base 4 into base 2. (Contributed by Mario Carneiro, 18-Feb-2014.)
⊢ 𝐴 ∈ ℕ₀ ⇒ ⊢ ((4 · 𝐴) + 3) = ((2 · ((2 · 𝐴) + 1)) + 1)

Theorem	halfthird 9599	Half minus a third. (Contributed by Scott Fenton, 8-Jul-2015.)
⊢ ((1 / 2) − (1 / 3)) = (1 / 6)

Theorem	5recm6rec 9600	One fifth minus one sixth. (Contributed by Scott Fenton, 9-Jan-2017.)
⊢ ((1 / 5) − (1 / 6)) = (1 / ;30)

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