| Alexander Ostrowski | GA5SXKN2EV | topic | open | Wikipedia List of Jewish mathematicians#CJ09 |
| Alexander Ostrowski | QPSK1HET7Y | topic | open | Wikipedia List of people by Erdős number#BLAF |
| Alexander Ostrowski | W425ZJ8GVJ | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q64975, nLab Alexander Ostrowski, ProofWiki Mathematician:Alexander_Markowich_Ostrowski, Wikipedia Alexander Ostrowski |
| Alexander Parvus | AQR8K2E73A | unknown | open | Wikipedia List of Ukrainian Jews#1Y0I |
| Alexander Paseau | 4MXRG6D171 | topic | open | Wikipedia Alexander Paseau, Wikidata Q124096631 |
| Alexander Pechen | 3VE5R015DC | topic | open | Wikipedia Alexander Pechen, Wikidata Q42306403 |
| Alexander Pfänder | 6YTNJ505B7 | topic | open | Wikipedia Alexander Pfänder, Wikidata Q72107 |
| Alexander Polyakov | 75YXCWDAC3 | unknown | open | Wikipedia List of string theory topics#CL41 |
| Alexander polynomial | J7S616NR80 | definition | open | Wikipedia List of polynomial topics#QAEC |
| Alexander polynomial | MV2K4Z4D9Q | concept | open | Wikidata Q1634206, MathWorld AlexanderPolynomial, nLab Alexander polynomial, Wikipedia Alexander polynomial |
| Alexander Postnikov | SS4RVXR29V | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#M6BD |
| Alexander R. A. Anderson | WF36YH7JJS | topic | open | Wikipedia Alexander R. A. Anderson, Wikidata Q63413745 |
| Alexander R. Its | ECN8MERGCN | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#C8NB |
| Alexander R. Kemer | 7NH62YGZQ3 | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#7NN9 |
| Alexander Ramm | 46ZKFDGCFA | topic | open | Wikipedia Alexander Ramm, Wikidata Q21834517 |
| Alexander Razborov | B5F72EA4ZQ | topic | open | Wikipedia List of Russian mathematicians#Z7ZR |
| Alexander Razborov | DJF0E8NE6D | topic | open | Wikipedia Alexander Razborov, Wikidata Q93019 |
| Alexander Razborov | YDX1ATCCMZ | topic | open | Wikipedia List of people by Erdős number#S61V |
| Alexander Razgulin | F2E5T3KAB0 | topic | open | Wikipedia Alexander Razgulin, Wikidata Q53973613 |
| Alexander Richardson | S0YPR4VH0X | topic | open | Wikipedia Alexander Richardson (Puritan intellectual), Wikidata Q116548165 |
| Alexander Rinnooy Kan | AFZ8W3GTHW | unknown | open | Wikipedia List of people by Erdős number#CNSF |
| Alexander S. Kechris | EZQFWCEN49 | topic | open | Wikipedia List of logicians#K72F |
| Alexander S. Kechris | KPFABCQDW4 | topic | open | Wikipedia List of people by Erdős number#OZ12, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#6N3W |
| Alexander S. Kechris | VC2P0705KG | topic | open | Wikipedia Alexander S. Kechris, Wikidata Q450151 |
| Alexander S. Kechris | YQW86GXCZ9 | topic | open | Wikipedia List of Greek mathematicians#QY8V |
| Alexander Samarskii | 1PZS4S5KBW | topic | open | Wikipedia Alexander Samarskii, Wikidata Q302434 |
| Alexander Samarskii | R3NMB1CYHX | topic | open | Wikipedia List of people by Erdős number#O916 |
| Alexander Schenkel | FEP4KV180Q | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q62068433, nLab Alexander Schenkel |
| Alexander Schmidt | 9DBJGGVKF0 | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q2642976, nLab Alexander Schmidt, Wikipedia Alexander Schmidt (mathematician) |
| Alexander Schrijver | 3N4K87P24W | topic | open | Wikipedia List of people by Erdős number#9SF6, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#IC9S, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#QZM7 |
| Alexander Schrijver | G4R0TE00WE | topic | open | Wikipedia Alexander Schrijver, Wikidata Q2642999 |
| Alexander Scott | FSY0TVNAPT | topic | open | Wikipedia Alexander Scott (British academic), Wikidata Q136032251 |
| Alexander Scott | XZ3WCN44GA | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#YM9K |
| Alexander Shapiro | BEDZP6BA3A | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#WPU9 |
| Alexander Shapiro | BHDKP3W8QC | topic | open | Wikipedia Alexander Shapiro, Wikidata Q83802152 |
| Alexander Soifer | EBQ07P54B2 | unknown | open | Wikipedia List of people by Erdős number#IZLQ |
| Alexander subbase theorem | TQMVSZHN4Y | statement | open | Wikipedia Subbase#GKU6 |
| Alexander trick | YHEGYRD8K8 | definition | open | Wikipedia Glossary of algebraic topology#2X67 |
| Alexander Tuzhilin | Y5C441D8XW | topic | open | Wikipedia Alexander Tuzhilin, Wikidata Q18619548 |
| Alexander V. Karzanov | 1J7J350QRS | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#VEAP |
| Alexander V. Karzanov | CW30F15SBE | topic | open | Wikipedia Alexander V. Karzanov, Wikidata Q64853097 |
| Alexander Varchenko | EBKJHQ4PDE | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q1458824, nLab Alexander Varchenko |
| Alexander Vardy | ZR97AMP4S4 | unknown | open | Wikipedia List of people by Erdős number#0ML6 |
| Alexander Vilenkin | F2CV3BKZA2 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q1399445, nLab Alexander Vilenkin |
| Alexander Vilenkin | G196XVCQZ2 | unknown | open | Wikipedia List of Ukrainian Jews#RBY7 |
| Alexander Volberg | W93TMA22SJ | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#EQUG |
| Alexander von Brill | NGH34ZP3AM | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#AXAC, Wikipedia List of German mathematicians#ZRUX |
| Alexander von Brill | QG9JMVS98D | topic | open | Wikipedia Alexander von Brill, Wikidata Q91386 |
| Alexander Webster | W1JCGDFZ6Y | unknown | open | Wikipedia List of actuaries#WENI |
| Alexander Weinstein | FZBWBG40SG | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#7L74, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#PLA4, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#VHGU |
| Alexander Weinstein | PE3A41S972 | topic | open | Wikipedia List of Jewish mathematicians#HNHO |
| Alexander Weinstein | QC0BRP1X0M | topic | open | Wikipedia Alexander Weinstein, Wikidata Q276980 |
| Alexander William Stern | QZE24HAJNA | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#X7V9 |
| Alexander Witting | 34JCDCG8KF | topic | open | Wikipedia List of German mathematicians#BWPM |
| Alexander Witting | FPZYP7EHBR | topic | open | Wikipedia Alexander Witting, Wikidata Q89038 |
| Alexander Wundheiler | TDD1GAQWFF | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#UL64 |
| Alexander Yu. Olshanskii | B6XNYWDN60 | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#3JJM |
| Alexander Yule Fraser | A0CV9PQ7D1 | topic | open | Wikipedia Alexander Yule Fraser, Wikidata Q37732641 |
| Alexander Zamolodchikov | DXYMSSXAXC | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q1333246, nLab Alexander Zamolodchikov |
| Alexander Zamolodchikov | PWWX7F61ZR | unknown | open | Wikipedia List of string theory topics#705C |
| Alexander Zinoviev | C00X7XVZG9 | topic | open | Wikipedia List of logicians#1DHB |
| Alexander Zinoviev | XQM78278YS | topic | open | Wikipedia Alexander Zinoviev, Wikidata Q449538 |
| Alexander Zolotarev | BSXF0FBP28 | unknown | open | Wikipedia List of Ukrainian Jews#4C55 |
| Alexander's subbase lemma | F43V0D2S2F | statement | open | Wikipedia Alexander's subbase lemma, Wikidata Q26882835 |
| Alexander's theorem | 5715XSAVSJ | statement | open | Wikipedia List of theorems#HEJJ |
| Alexander's theorem | 6FVMSPBF1A | statement | open | Wikipedia List of knot theory topics#GBYE |
| Alexander's theorem | 9BR9CPZ65C | statement | open | Wikidata Q19360789, EoM Alexander_theorem_on_braids, MathWorld AlexandersTheorem, Wikipedia Alexander's theorem |
| Alexander's trick | A1GRDJ0FV0 | definition | open | Wikipedia Alexander's trick, Wikidata Q4718108 |
| Alexander-Briggs notation | 9ZYYPPMVN2 | unknown | open | Wikipedia Knot theory#6AXA |
| Alexanderson Award | E2DMNSX770 | definition | open | Wikipedia Alexanderson Award, Wikidata Q125503811 |
| Alexander–Conway polynomial | NJ4FMTCFX7 | definition | open | Wikipedia List of things named after John Horton Conway#61AS |
| Alexander–Hirschowitz theorem | VHWDQBYQ3Y | statement | open | Wikipedia Alexander–Hirschowitz theorem, Wikidata Q105081875 |
| Alexander–Spanier cohomology | RXMAYCR9MK | definition | open | Wikipedia Alexander–Spanier cohomology, Wikidata Q4143007 |
| Alexandr Kostochka | EVEYMJCKXE | topic | open | Wikipedia Alexandr Kostochka, Wikidata Q102109975 |
| Alexandr Mishchenko | 76AHXQJR2M | topic | open | Wikipedia Alexandr Mishchenko, Wikidata Q18559579 |
| Alexandra Bellow | 526H42NAGQ | topic | open | Wikipedia Alexandra Bellow, Wikidata Q1500025 |
| Alexandra Bellow | P9XX0NGXX4 | topic | open | Wikipedia List of people by Erdős number#94IE |
| Alexandra Carpentier | S8PS038RVX | topic | open | Wikipedia Alexandra Carpentier, Wikidata Q85931227 |
| Alexandra Duel-Hallen | 1ZZGAYDTG9 | unknown | open | Wikipedia List of people by Erdős number#JNOW |
| Alexandra Illmer Forsythe | HR8NQ1WGVG | unknown | open | Wikipedia List of people by Erdős number#O9WA |
| Alexandra M. Schmidt | EBRPH8RPE4 | topic | open | Wikipedia Alexandra M. Schmidt, Wikidata Q57244361 |
| Alexandra M. Schmidt | XV845W5M0J | topic | open | Wikipedia List of fellows of the American Statistical Association#9RD7 |
| Alexandra Nechita | XNB6X4HTT3 | unknown | open | Wikipedia List of University of California, Los Angeles people#5KGW |
| Alexandra Seceleanu | 7MR69X9FME | topic | open | Wikipedia Alexandra Seceleanu, Wikidata Q125123911 |
| Alexandra Silva | ZKWJ24PBY6 | unknown | open | Wikipedia List of women logicians#A9ZF |
| Alexandre Eremenko | B51S6TK82H | topic | open | Wikipedia Alexandre Eremenko, Wikidata Q4720833 |
| Alexandre Eremenko | R72TYHJHTH | topic | open | Wikipedia List of people by Erdős number#6K2P, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#5SPG |
| Alexandre Ivanoff | 2T3GZ1ACK5 | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#Q591 |
| Alexandre Joel Chorin | 5HFAS63MPX | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#VBTI |
| Alexandre Kirillov | 2G5W0CMD5T | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q925405, nLab Alexandre Kirillov, Wikipedia Alexandre Kirillov |
| Alexandre Kirillov | MR68X7AE7S | topic | open | Wikipedia List of people by Erdős number#9QNP |
| Alexandre L. Chistov | M15ZY8VXS1 | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#9O6W |
| Alexandre Savérien | ACXCEWMTMN | topic | open | Wikipedia Alexandre Savérien, Wikidata Q2834016 |
| Alexandre Tsybakov | 8BTGNPK2WX | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#S4W2 |
| Alexandre Varchenko | PKYPZP421C | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#X26D |
| Alexandre Vinogradov | Z21RMCKTJA | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q83589816, nLab Alexandre Vinogradov, Wikipedia Alexandre Mikhailovich Vinogradov |
| Alexandroff compactification | ENJTYE1P29 | definition | open | Wikipedia Glossary of general topology#N5HZ |
| Alexandroff extension | 7KCW25BK3K | definition | node (a node has the same Wikidata item as the row) | Wikidata Q864919, EoM Aleksandrov_compactification, MathWorld One-PointCompactification, nLab one-point compactification, Wikipedia Alexandroff extension |
| Alexandroff extension | CJYJQ8PRSR | definition | open | Wikipedia List of topologies#JX5A |
| Alexandroff plank | W4BKDQ92JG | unknown | open | Wikipedia List of topologies#HE5F |