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Theorem List for Metamath Proof Explorer - 10401-10500   *Has distinct variable group(s)
TypeLabelDescription
Statement

Theoremuzind3 10401* Induction on the upper integers that start at an integer . The first four hypotheses give us the substitution instances we need, and the last two are the basis and the induction hypothesis. (Contributed by NM, 26-Jul-2005.)

TheoremuzindOLD 10402* Induction on the upper integers that start at an integer . The first four hypotheses give us the substitution instances we need; the last two are the basis and the induction hypothesis.

Warning: The HTML proof page is 3/4 megabyte in size. An attempt to shorten it is on my to-do list. Anyone is welcome to try. (Contributed by NM, 11-May-2004.) (New usage is discouraged.) (Proof modification is discouraged.)

Theoremuzind3OLD 10403* Induction on the set of upper integers that starts at . The first four hypotheses give us the substitution instances we need, and the last two are the basis and the induction hypothesis. (Contributed by NM, 9-Nov-2004.) (Proof modification is discouraged.) (New usage is discouraged.)

Theoremnn0ind 10404* Principle of Mathematical Induction (inference schema) on nonnegative integers. The first four hypotheses give us the substitution instances we need; the last two are the basis and the induction hypothesis. (Contributed by NM, 13-May-2004.)

Theoremnn0indALT 10405* Principle of Mathematical Induction (inference schema) on nonnegative integers. The last four hypotheses give us the substitution instances we need; the first two are the basis and the induction hypothesis. Either nn0ind 10404 or nn0indALT 10405 may be used; see comment for nnind 10056. (Contributed by NM, 28-Nov-2005.)

Theoremfzind 10406* Induction on the integers from to inclusive . The first four hypotheses give us the substitution instances we need; the last two are the basis and the induction hypothesis. (Contributed by Paul Chapman, 31-Mar-2011.)

Theoremfnn0ind 10407* Induction on the integers from to inclusive . The first four hypotheses give us the substitution instances we need; the last two are the basis and the induction hypothesis. (Contributed by Paul Chapman, 31-Mar-2011.)

Theoremnn0ind-raph 10408* Principle of Mathematical Induction (inference schema) on nonnegative integers. The first four hypotheses give us the substitution instances we need; the last two are the basis and the induction hypothesis. Raph Levien remarks: "This seems a bit painful. I wonder if an explicit substitution version would be easier." (Contributed by Raph Levien, 10-Apr-2004.)

Theoremzindd 10409* Principle of Mathematical Induction on all integers, deduction version. The first five hypotheses give the substitutions; the last three are the basis, the induction, and the extension to negative numbers. (Contributed by Paul Chapman, 17-Apr-2009.) (Proof shortened by Mario Carneiro, 4-Jan-2017.)

Theorembtwnz 10410* Any real number can be sandwiched between two integers. Exercise 2 of [Apostol] p. 28. (Contributed by NM, 10-Nov-2004.)

Theoremnn0zd 10411 A natural number is an integer. (Contributed by Mario Carneiro, 28-May-2016.)

Theoremnnzd 10412 A nonnegative integer is an integer. (Contributed by Mario Carneiro, 28-May-2016.)

Theoremzred 10413 An integer is a real number. (Contributed by Mario Carneiro, 28-May-2016.)

Theoremzcnd 10414 An integer is a complex number. (Contributed by Mario Carneiro, 28-May-2016.)

Theoremznegcld 10415 Closure law for negative integers. (Contributed by Mario Carneiro, 28-May-2016.)

Theorempeano2zd 10416 Deduction from second Peano postulate generalized to integers. (Contributed by Mario Carneiro, 28-May-2016.)

Theoremzaddcld 10417 Closure of addition of integers. (Contributed by Mario Carneiro, 28-May-2016.)

Theoremzsubcld 10418 Closure of subtraction of integers. (Contributed by Mario Carneiro, 28-May-2016.)

Theoremzmulcld 10419 Closure of multiplication of integers. (Contributed by Mario Carneiro, 28-May-2016.)

5.4.8  Decimal arithmetic

Syntaxcdc 10420 Constant used for decimal constructor.
;

Definitiondf-dec 10421 Define the "decimal constructor", which is used to build up "decimal integers" or "numeric terms" in base 10. For example, ;;; ;;; ;;; 1kp2ke3k 21792. (Contributed by Mario Carneiro, 17-Apr-2015.)
;

Theoremdecex 10422 A decimal number is a set. (Contributed by Mario Carneiro, 17-Apr-2015.)
;

Theoremdeceq1 10423 Equality theorem for the decimal constructor. (Contributed by Mario Carneiro, 17-Apr-2015.)
; ;

Theoremdeceq2 10424 Equality theorem for the decimal constructor. (Contributed by Mario Carneiro, 17-Apr-2015.)
; ;

Theoremdeceq1i 10425 Equality theorem for the decimal constructor. (Contributed by Mario Carneiro, 17-Apr-2015.)
; ;

Theoremdeceq2i 10426 Equality theorem for the decimal constructor. (Contributed by Mario Carneiro, 17-Apr-2015.)
; ;

Theoremdeceq12i 10427 Equality theorem for the decimal constructor. (Contributed by Mario Carneiro, 17-Apr-2015.)
; ;

Theoremnumnncl 10428 Closure for a numeral (with units place). (Contributed by Mario Carneiro, 18-Feb-2014.)

Theoremnum0u 10429 Add a zero in the units place. (Contributed by Mario Carneiro, 18-Feb-2014.)

Theoremnum0h 10430 Add a zero in the higher places. (Contributed by Mario Carneiro, 18-Feb-2014.)

Theoremnumcl 10431 Closure for a decimal integer (with units place). (Contributed by Mario Carneiro, 18-Feb-2014.)

Theoremnumsuc 10432 The successor of a decimal integer (no carry). (Contributed by Mario Carneiro, 18-Feb-2014.)

Theoremdecnncl 10433 Closure for a numeral. (Contributed by Mario Carneiro, 17-Apr-2015.)
;

Theoremdeccl 10434 Closure for a numeral. (Contributed by Mario Carneiro, 17-Apr-2015.)
;

Theoremdec0u 10435 Add a zero in the units place. (Contributed by Mario Carneiro, 17-Apr-2015.)
;

Theoremdec0h 10436 Add a zero in the higher places. (Contributed by Mario Carneiro, 17-Apr-2015.)
;

Theoremnumnncl2 10437 Closure for a decimal integer (zero units place). (Contributed by Mario Carneiro, 9-Mar-2015.)

Theoremdecnncl2 10438 Closure for a decimal integer (zero units place). (Contributed by Mario Carneiro, 17-Apr-2015.)
;

Theoremnumlt 10439 Comparing two decimal integers (equal higher places). (Contributed by Mario Carneiro, 18-Feb-2014.)

Theoremnumltc 10440 Comparing two decimal integers (unequal higher places). (Contributed by Mario Carneiro, 18-Feb-2014.)

Theoremdeclt 10441 Comparing two decimal integers (equal higher places). (Contributed by Mario Carneiro, 17-Apr-2015.)
; ;

Theoremdecltc 10442 Comparing two decimal integers (unequal higher places). (Contributed by Mario Carneiro, 18-Feb-2014.)
; ;

Theoremdecsuc 10443 The successor of a decimal integer (no carry). (Contributed by Mario Carneiro, 17-Apr-2015.)
;       ;

Theoremnumlti 10444 Comparing a digit to a decimal integer. (Contributed by Mario Carneiro, 18-Feb-2014.)

Theoremdeclti 10445 Comparing a digit to a decimal integer. (Contributed by Mario Carneiro, 18-Feb-2014.)
;

Theoremnumsucc 10446 The successor of a decimal integer (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.)

Theoremdecsucc 10447 The successor of a decimal integer (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
;       ;

Theorem1e0p1 10448 The successor of zero. (Contributed by Mario Carneiro, 18-Feb-2014.)

Theoremdec10p 10449 Ten plus an integer. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theoremdec10 10450 The decimal form of 10. NB: In our presentations of large numbers later on, we will use our symbol for 10 at the highest digits when advantageous, because we can use this theorem to convert back to "long form" (where each digit is in the range 0-9) with no extra effort. However, we cannot do this for lower digits while maintaining the ease of use of the decimal system, since it requires nontrivial number knowledge (more than just equality theorems) to convert back. (Contributed by Mario Carneiro, 18-Feb-2014.)
;

Theoremnumma 10451 Perform a multiply-add of two decimal integers and against a fixed multiplicand (no carry). (Contributed by Mario Carneiro, 18-Feb-2014.)

Theoremnummac 10452 Perform a multiply-add of two decimal integers and against a fixed multiplicand (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.)

Theoremnumma2c 10453 Perform a multiply-add of two decimal integers and against a fixed multiplicand (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.)

Theoremnumadd 10454 Add two decimal integers and (no carry). (Contributed by Mario Carneiro, 18-Feb-2014.)

Theoremnumaddc 10455 Add two decimal integers and (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.)

Theoremnummul1c 10456 The product of a decimal integer with a number. (Contributed by Mario Carneiro, 18-Feb-2014.)

Theoremnummul2c 10457 The product of a decimal integer with a number (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.)

Theoremdecma 10458 Perform a multiply-add of two numerals and against a fixed multiplicand (no carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
;       ;                            ;

Theoremdecmac 10459 Perform a multiply-add of two numerals and against a fixed multiplicand (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
;       ;                                   ;       ;

Theoremdecma2c 10460 Perform a multiply-add of two numerals and against a fixed multiplicand (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
;       ;                                   ;       ;

Theoremdecadd 10461 Add two numerals and (no carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
;       ;                     ;

Theoremdecaddc 10462 Add two numerals and (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
;       ;                     ;       ;

Theoremdecaddc2 10463 Add two numerals and (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
;       ;                     ;

Theoremdecaddi 10464 Add two numerals and (no carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
;              ;

Theoremdecaddci 10465 Add two numerals and (no carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
;                     ;       ;

Theoremdecaddci2 10466 Add two numerals and (no carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
;                     ;

Theoremdecmul1c 10467 The product of a numeral with a number. (Contributed by Mario Carneiro, 18-Feb-2014.)
;                            ;       ;

Theoremdecmul2c 10468 The product of a numeral with a number (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.)
;                            ;       ;

Theorem6p5lem 10469 Lemma for 6p5e11 10470 and related theorems. (Contributed by Mario Carneiro, 19-Apr-2015.)
;       ;

Theorem6p5e11 10470 6 + 5 = 11. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem6p6e12 10471 6 + 6 = 12. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem7p4e11 10472 7 + 4 = 11. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem7p5e12 10473 7 + 5 = 12. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem7p6e13 10474 7 + 6 = 13. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem7p7e14 10475 7 + 7 = 14. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem8p3e11 10476 8 + 3 = 11. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem8p4e12 10477 8 + 4 = 12. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem8p5e13 10478 8 + 5 = 13. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem8p6e14 10479 8 + 6 = 14. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem8p7e15 10480 8 + 7 = 15. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem8p8e16 10481 8 + 8 = 16. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem9p2e11 10482 9 + 2 = 11. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem9p3e12 10483 9 + 3 = 12. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem9p4e13 10484 9 + 4 = 13. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem9p5e14 10485 9 + 5 = 14. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem9p6e15 10486 9 + 6 = 15. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem9p7e16 10487 9 + 7 = 16. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem9p8e17 10488 9 + 8 = 17. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem9p9e18 10489 9 + 9 = 18. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem10p10e20 10490 10 + 10 = 20. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem4t3lem 10491 Lemma for 4t3e12 10492 and related theorems. (Contributed by Mario Carneiro, 19-Apr-2015.)

Theorem4t3e12 10492 4 times 3 equals 12. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem4t4e16 10493 4 times 4 equals 16. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem5t3e15 10494 5 times 3 equals 15. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem5t4e20 10495 5 times 4 equals 20. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem5t5e25 10496 5 times 5 equals 25. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem6t2e12 10497 6 times 2 equals 12. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem6t3e18 10498 6 times 3 equals 18. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem6t4e24 10499 6 times 4 equals 24. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

Theorem6t5e30 10500 6 times 5 equals 30. (Contributed by Mario Carneiro, 19-Apr-2015.)
;

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