author | huffman |
Wed, 28 Mar 2012 12:28:24 +0200 | |
changeset 47183 | f760e15343bc |
parent 44048 | 64f574163ca2 |
child 48611 | b34ff75c23a7 |
permissions | -rw-r--r-- |
27376 | 1 |
theory Numbers |
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imports Complex_Main |
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begin |
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ML "Pretty.margin_default := 64" |
38767
d8da44a8dd25
proper context for various Thy_Output options, via official configuration options in ML and Isar;
wenzelm
parents:
37216
diff
changeset
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declare [[thy_output_indent = 0]] (*we don't want 5 for listing theorems*) |
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text{* |
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numeric literals; default simprules; can re-orient |
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*} |
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lemma "2 * m = m + m" |
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txt{* |
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@{subgoals[display,indent=0,margin=65]} |
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*}; |
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oops |
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fun h :: "nat \<Rightarrow> nat" where |
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"h i = (if i = 3 then 2 else i)" |
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text{* |
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@{term"h 3 = 2"} |
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@{term"h i = i"} |
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*} |
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text{* |
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@{thm[display] numeral_1_eq_1[no_vars]} |
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\rulename{numeral_1_eq_1} |
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@{thm[display] add_2_eq_Suc[no_vars]} |
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\rulename{add_2_eq_Suc} |
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@{thm[display] add_2_eq_Suc'[no_vars]} |
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\rulename{add_2_eq_Suc'} |
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@{thm[display] add_assoc[no_vars]} |
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\rulename{add_assoc} |
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@{thm[display] add_commute[no_vars]} |
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\rulename{add_commute} |
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@{thm[display] add_left_commute[no_vars]} |
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\rulename{add_left_commute} |
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these form add_ac; similarly there is mult_ac |
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*} |
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lemma "Suc(i + j*l*k + m*n) = f (n*m + i + k*j*l)" |
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txt{* |
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@{subgoals[display,indent=0,margin=65]} |
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*}; |
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apply (simp add: add_ac mult_ac) |
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txt{* |
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@{subgoals[display,indent=0,margin=65]} |
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*}; |
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oops |
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text{* |
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@{thm[display] div_le_mono[no_vars]} |
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\rulename{div_le_mono} |
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@{thm[display] diff_mult_distrib[no_vars]} |
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\rulename{diff_mult_distrib} |
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@{thm[display] mult_mod_left[no_vars]} |
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\rulename{mult_mod_left} |
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@{thm[display] nat_diff_split[no_vars]} |
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\rulename{nat_diff_split} |
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*} |
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12156
d2758965362e
new-style numerals without leading #, along with generic 0 and 1
paulson
parents:
11711
diff
changeset
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lemma "(n - 1) * (n + 1) = n * n - (1::nat)" |
12843
50bd380e6675
iff del: less_Suc0 -- luckily this does NOT affect the printed text;
wenzelm
parents:
12156
diff
changeset
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apply (clarsimp split: nat_diff_split iff del: less_Suc0) |
12156
d2758965362e
new-style numerals without leading #, along with generic 0 and 1
paulson
parents:
11711
diff
changeset
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--{* @{subgoals[display,indent=0,margin=65]} *} |
d2758965362e
new-style numerals without leading #, along with generic 0 and 1
paulson
parents:
11711
diff
changeset
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apply (subgoal_tac "n=0", force, arith) |
d2758965362e
new-style numerals without leading #, along with generic 0 and 1
paulson
parents:
11711
diff
changeset
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done |
d2758965362e
new-style numerals without leading #, along with generic 0 and 1
paulson
parents:
11711
diff
changeset
|
80 |
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d2758965362e
new-style numerals without leading #, along with generic 0 and 1
paulson
parents:
11711
diff
changeset
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81 |
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lemma "(n - 2) * (n + 2) = n * n - (4::nat)" |
12156
d2758965362e
new-style numerals without leading #, along with generic 0 and 1
paulson
parents:
11711
diff
changeset
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apply (simp split: nat_diff_split, clarify) |
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--{* @{subgoals[display,indent=0,margin=65]} *} |
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apply (subgoal_tac "n=0 | n=1", force, arith) |
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done |
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text{* |
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@{thm[display] mod_if[no_vars]} |
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\rulename{mod_if} |
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@{thm[display] mod_div_equality[no_vars]} |
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\rulename{mod_div_equality} |
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@{thm[display] div_mult1_eq[no_vars]} |
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\rulename{div_mult1_eq} |
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@{thm[display] mod_mult_right_eq[no_vars]} |
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\rulename{mod_mult_right_eq} |
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@{thm[display] div_mult2_eq[no_vars]} |
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\rulename{div_mult2_eq} |
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@{thm[display] mod_mult2_eq[no_vars]} |
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\rulename{mod_mult2_eq} |
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@{thm[display] div_mult_mult1[no_vars]} |
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\rulename{div_mult_mult1} |
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@{thm[display] div_by_0 [no_vars]} |
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\rulename{div_by_0} |
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@{thm[display] mod_by_0 [no_vars]} |
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\rulename{mod_by_0} |
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@{thm[display] dvd_antisym[no_vars]} |
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\rulename{dvd_antisym} |
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@{thm[display] dvd_add[no_vars]} |
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\rulename{dvd_add} |
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For the integers, I'd list a few theorems that somehow involve negative |
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numbers.*} |
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text{* |
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Division, remainder of negatives |
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@{thm[display] pos_mod_sign[no_vars]} |
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\rulename{pos_mod_sign} |
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@{thm[display] pos_mod_bound[no_vars]} |
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\rulename{pos_mod_bound} |
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@{thm[display] neg_mod_sign[no_vars]} |
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\rulename{neg_mod_sign} |
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@{thm[display] neg_mod_bound[no_vars]} |
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\rulename{neg_mod_bound} |
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@{thm[display] zdiv_zadd1_eq[no_vars]} |
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\rulename{zdiv_zadd1_eq} |
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@{thm[display] mod_add_eq[no_vars]} |
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\rulename{mod_add_eq} |
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@{thm[display] zdiv_zmult1_eq[no_vars]} |
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\rulename{zdiv_zmult1_eq} |
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@{thm[display] mod_mult_right_eq[no_vars]} |
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\rulename{mod_mult_right_eq} |
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@{thm[display] zdiv_zmult2_eq[no_vars]} |
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\rulename{zdiv_zmult2_eq} |
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@{thm[display] zmod_zmult2_eq[no_vars]} |
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\rulename{zmod_zmult2_eq} |
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*} |
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lemma "abs (x+y) \<le> abs x + abs (y :: int)" |
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by arith |
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lemma "abs (2*x) = 2 * abs (x :: int)" |
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by (simp add: abs_if) |
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text {*Induction rules for the Integers |
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@{thm[display] int_ge_induct[no_vars]} |
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\rulename{int_ge_induct} |
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@{thm[display] int_gr_induct[no_vars]} |
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\rulename{int_gr_induct} |
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@{thm[display] int_le_induct[no_vars]} |
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\rulename{int_le_induct} |
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@{thm[display] int_less_induct[no_vars]} |
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\rulename{int_less_induct} |
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*} |
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text {*FIELDS |
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@{thm[display] dense[no_vars]} |
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\rulename{dense} |
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@{thm[display] times_divide_eq_right[no_vars]} |
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\rulename{times_divide_eq_right} |
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@{thm[display] times_divide_eq_left[no_vars]} |
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\rulename{times_divide_eq_left} |
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@{thm[display] divide_divide_eq_right[no_vars]} |
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\rulename{divide_divide_eq_right} |
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@{thm[display] divide_divide_eq_left[no_vars]} |
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\rulename{divide_divide_eq_left} |
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@{thm[display] minus_divide_left[no_vars]} |
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\rulename{minus_divide_left} |
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@{thm[display] minus_divide_right[no_vars]} |
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\rulename{minus_divide_right} |
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This last NOT a simprule |
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@{thm[display] add_divide_distrib[no_vars]} |
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\rulename{add_divide_distrib} |
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*} |
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lemma "3/4 < (7/8 :: real)" |
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by simp |
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lemma "P ((3/4) * (8/15 :: real))" |
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txt{* |
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@{subgoals[display,indent=0,margin=65]} |
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*}; |
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apply simp |
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txt{* |
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@{subgoals[display,indent=0,margin=65]} |
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*}; |
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oops |
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lemma "(3/4) * (8/15) < (x :: real)" |
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txt{* |
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@{subgoals[display,indent=0,margin=65]} |
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*}; |
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apply simp |
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txt{* |
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@{subgoals[display,indent=0,margin=65]} |
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*}; |
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oops |
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text{* |
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Ring and Field |
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Requires a field, or else an ordered ring |
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@{thm[display] mult_eq_0_iff[no_vars]} |
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\rulename{mult_eq_0_iff} |
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@{thm[display] mult_cancel_right[no_vars]} |
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\rulename{mult_cancel_right} |
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@{thm[display] mult_cancel_left[no_vars]} |
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\rulename{mult_cancel_left} |
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*} |
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text{* |
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effect of show sorts on the above |
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@{thm[display,show_sorts] mult_cancel_left[no_vars]} |
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\rulename{mult_cancel_left} |
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*} |
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text{* |
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absolute value |
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@{thm[display] abs_mult[no_vars]} |
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\rulename{abs_mult} |
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@{thm[display] abs_le_iff[no_vars]} |
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\rulename{abs_le_iff} |
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@{thm[display] abs_triangle_ineq[no_vars]} |
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\rulename{abs_triangle_ineq} |
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@{thm[display] power_add[no_vars]} |
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\rulename{power_add} |
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@{thm[display] power_mult[no_vars]} |
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\rulename{power_mult} |
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@{thm[display] power_abs[no_vars]} |
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\rulename{power_abs} |
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*} |
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end |