1-to-1 mapping

One-to-one, Injective function, 1 + 1 + 1 + 1 + ⋯, 1×1=1 (To Be One), 1+1, 1:1, 1, 1/2 + 1/4 + 1/8 + 1/16 + ⋯, 1/4 + 1/16 + 1/64 + 1/256 + ⋯, 1/2 − 1/4 + 1/8 − 1/16 + ⋯, 1+1 (TV channel), Schweizer SGP 1-1, −1, 1 Samuel 1, 1-Aminoindane, 1.1.1-Propellane, List of 9-1-1 episodes, 1.1, K-1, 1.1.1.1, 1 of 1 (Shinee album), 1+1 Media Group, 1 Chronicles 1, 1-1, Genesis 1:1, 1&1 AG, Des(1-3)IGF-1, 1-Androsterone, Sat.1, Peptidase 1 (mite), 1-Naphthylaminopropane, 1-(1-Naphthyl)piperazine, 1-Methyltryptamine, Smart 1, IN-1, 1-Aminocyclopropane-1-carboxylate synthase, 1-Aminotetralin, Csc-1, Cot-1, Sin-1, Tan-1

System 1, Sec-1, John 1, 1+1 (song), World 1-1, 2-in-1 laptop, Cos-1, RP-1, List of 9-1-1: Lone Star episodes, 1 series, 8-1-1, M-1 Global, Proverbs 1, Meteor-1 1, YSES 1, Wrestle-1, Schweizer SGU 1-19, Alpha-1 blocker, 9-1-1: Lone Star, 1–2–1–1 zone press, 1% rule, TGC-1, 1-bit computing, Matthew 1:1, 1 Squadron, 2015 in K-1, Cyclooxygenase-1, List of K-1 events, GS-1, 1-Hydroxyphenanthrene, (R)-1-Aminoindane, 1.1-inch/75-caliber gun, Apiose 1-reductase, Yuegong-1, Line 1, Aldose 1-dehydrogenase, Jodi No.1, Alpha 1, SMART-1, VMCJ-1, 1-Butene, 1 to 3, Continental KB-1, Acts 1, IGF-1 LR3, 1 Samuel 7, U.S. Route 1/9, MIR7-1, Wrestle-1 Championship, Chromosome 1

One-to-one, Injective function, 1 + 1 + 1 + 1 + ⋯, 1×1=1 (To Be One), 1+1, 1:1, 1, 1/2 + 1/4 + 1/8 + 1/16 + ⋯, 1/4 + 1/16 + 1/64 + 1/256 + ⋯, 1/2 − 1/4 + 1/8 − 1/16 + ⋯, 1+1 (TV channel), Schweizer SGP 1-1, −1, 1 Samuel 1, 1-Aminoindane, 1.1.1-Propellane, List of 9-1-1 episodes, 1.1, K-1, 1.1.1.1, 1 of 1 (Shinee album), 1+1 Media Group, 1 Chronicles 1, 1-1, Genesis 1:1, 1&1 AG, Des(1-3)IGF-1, 1-Androsterone, Sat.1, Peptidase 1 (mite), 1-Naphthylaminopropane, 1-(1-Naphthyl)piperazine, 1-Methyltryptamine, Smart 1, IN-1, 1-Aminocyclopropane-1-carboxylate synthase, 1-Aminotetralin, Csc-1, Cot-1, Sin-1, Tan-1, System 1, Sec-1, John 1, 1+1 (song), World 1-1, 2-in-1 laptop, Cos-1, RP-1, List of 9-1-1: Lone Star episodes, 1 series, 8-1-1, M-1 Global, Proverbs 1, Meteor-1 1, YSES 1, Wrestle-1, Schweizer SGU 1-19, Alpha-1 blocker, 9-1-1: Lone Star, 1–2–1–1 zone press, 1% rule, TGC-1, 1-bit computing, Matthew 1:1, 1 Squadron, 2015 in K-1, Cyclooxygenase-1, List of K-1 events, GS-1, 1-Hydroxyphenanthrene, (R)-1-Aminoindane, 1.1-inch/75-caliber gun, Apiose 1-reductase, Yuegong-1, Line 1, Aldose 1-dehydrogenase, Jodi No.1, Alpha 1, SMART-1, VMCJ-1, 1-Butene, 1 to 3, Continental KB-1, Acts 1, IGF-1 LR3, 1 Samuel 7, U.S. Route 1/9, MIR7-1, Wrestle-1 Championship, Chromosome 1, (1-hydroxycyclohexan-1-yl)acetyl-CoA lyase, Raad-1, NK2 homeobox 1, SpareBank 1, (S)-1-phenylethanol dehydrogenase, Job 1, Glucose 1-dehydrogenase, BNT 1, 1 − 2 + 3 − 4 + ⋯, MRT 1, 1 Samuel 5, Soundtrack 1, NKX3-1, List of 9-1-1 characters, USS SC-1, Latin-1 Supplement, 1-Propanol, 1 BC, BBC Radio 1, U.S. Route 1, L-galactose 1-dehydrogenase, Revelation 1, Taepodong-1, Ribose 1-dehydrogenase (NADP+), 1. Liga, DOS 1, Zechariah 1, Galactose 1-dehydrogenase (NADP+), Königstuhl 1, Salyut 1, A.1. Sauce, 1-Aminocyclopropane-1-carboxylic acid, Song of Songs 1, 1-2-3, TVNZ 1, Glasflügel BS-1, 1:144 scale, Esther 1, Falcon 1, Glucose 1-phosphate, 5-1-1, L-rhamnose 1-dehydrogenase, Glucose 1-dehydrogenase (NADP+), TOS-1, Glucose 1-dehydrogenase (NAD+), Russia-1, 1–3–1 defense and offense, Farm to Market Road 1, Flight 1, GLP-1 receptor agonist, Zerstörergeschwader 1, Nikon 1-mount, 1-Deoxy-11beta-hydroxypentalenate dehydrogenase, L-arabinose 1-dehydrogenase, 1 × 1, Tier 1 network, MPEG-1, 1-Lysophosphatidylcholine, AP-1 transcription factor, KS-1 Komet