4063
This definition of covering dimension can be extended from the class of normal spaces to all Tychonoff spaces merely by replacing the term " open " in the definition by the term " " functionally open " " .
 person: Tychonoff
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Tychonoff