Sorgenfrey plane

Summary

Sorgenfrey plane is a Hausdorff space^[1]. It draws 47 Wikipedia views per month (hausdorff_space category, ranking #2 of 3).^[2]

Key Facts

• Sorgenfrey plane's image is recorded as Sorgenfrey plane.png^[3].
• Sorgenfrey plane's instance of is recorded as Hausdorff space^[4].
• Sorgenfrey plane's instance of is recorded as completely regular space^[5].
• Sorgenfrey plane's instance of is recorded as separable space^[6].
• Sorgenfrey plane's instance of is recorded as first-countable space^[7].
• Sorgenfrey plane's instance of is recorded as totally disconnected space^[8].
• Robert Sorgenfrey is named after Sorgenfrey plane^[9].
• Sorgenfrey plane's Freebase ID is recorded as /m/032ml0^[10].
• Sorgenfrey plane's Microsoft Academic ID is recorded as 2779558782^[11].
• Sorgenfrey plane's ProofWiki ID is recorded as Definition:Sorgenfrey's_Half-Open_Square_Topology^[12].

Why It Matters

Sorgenfrey plane draws 47 Wikipedia views per month (hausdorff_space category, ranking #2 of 3).^[2] It has Wikipedia articles in 9 language editions, a strong signal of global cultural recognition.^[13]