Calculus?????????
I don’t think you need such advanced mathematics for this situation.
According to the Oxford Dictionary, a definition of calculus is:
"A particular method or system of calculation or reasoning"
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And they define calculation as:
"A mathematical determination of the amount or number of something."
The world's leading online dictionary: English definitions, synonyms, word origins, example sentences, word games, and more. A trusted authority for 25+ years!
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In other words, a calculus is any mathematical operation, be it simple or complex. Yes, for the Wimbledon seeding formula you need to do a calculus. A simple calculus is still a calculus. In bold you can see the simple calculus I made (basically substractions and additions).
Wimbledon special seeding forumula: TP Entry System Position points + 100% points earned for all grass court tournaments in the past 12 months + 75% points earned for the best grass court tournament in the 12 months before that.
First I calculated how many points will Federer lose before Wimbledon. Federer won last year 500 points in Dubai, 600 in Indian Wells, 1000 in Miami, 180 in Madrid, 90 in Rome and 720 at Roland-Garros for a total of 3090 points. Right now he has 7130.
7130-3090 = 4040 ATP points.
Then I applied the Wimbledon seeding formula to Federer:
If Federer wins Halle 2020, he will have 4040 ATP points.
4040 + 1200 + 500 + 270 = 6010 points. Federer owuld have 6010 points considering Wimbledon seeding formula. BUT Medveved is #4 in the ranking and has 5890 points in the ATP ranking.
If we apply the Wimbledon's seeding formula to Medvedev (assuming he stays with the same number of ATP points) he would have 6227 ATP points.
5890 + 90 + 180 + 67 = 6227. In other words, Medvedev will be seeded #4 at Wimbledon 2020.