equal
deleted
inserted
replaced
1034 |
1034 |
1035 lemma diff_eq_diff_less_eq: |
1035 lemma diff_eq_diff_less_eq: |
1036 "a - b = c - d \<Longrightarrow> a \<le> b \<longleftrightarrow> c \<le> d" |
1036 "a - b = c - d \<Longrightarrow> a \<le> b \<longleftrightarrow> c \<le> d" |
1037 by (auto simp only: le_iff_diff_le_0 [of a b] le_iff_diff_le_0 [of c d]) |
1037 by (auto simp only: le_iff_diff_le_0 [of a b] le_iff_diff_le_0 [of c d]) |
1038 |
1038 |
|
1039 lemma diff_mono: "a \<le> b \<Longrightarrow> d \<le> c \<Longrightarrow> a - c \<le> b - d" |
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1040 by (simp add: field_simps add_mono) |
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1041 |
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1042 lemma diff_left_mono: "b \<le> a \<Longrightarrow> c - a \<le> c - b" |
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1043 by (simp add: field_simps) |
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1044 |
|
1045 lemma diff_right_mono: "a \<le> b \<Longrightarrow> a - c \<le> b - c" |
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1046 by (simp add: field_simps) |
|
1047 |
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1048 lemma diff_strict_mono: "a < b \<Longrightarrow> d < c \<Longrightarrow> a - c < b - d" |
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1049 by (simp add: field_simps add_strict_mono) |
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1050 |
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1051 lemma diff_strict_left_mono: "b < a \<Longrightarrow> c - a < c - b" |
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1052 by (simp add: field_simps) |
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1053 |
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1054 lemma diff_strict_right_mono: "a < b \<Longrightarrow> a - c < b - c" |
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1055 by (simp add: field_simps) |
|
1056 |
1039 end |
1057 end |
1040 |
1058 |
1041 ML_file "Tools/group_cancel.ML" |
1059 ML_file "Tools/group_cancel.ML" |
1042 |
1060 |
1043 simproc_setup group_cancel_add ("a + b::'a::ab_group_add") = |
1061 simproc_setup group_cancel_add ("a + b::'a::ab_group_add") = |