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103.39 A lemma to solve Langley’s problem

Published online by Cambridge University Press:  21 October 2019

Yongcheng Chen
Yongcheng Chen*
Affiliation:
3315 Edwards Court, Greenville, NC 27858USA e-mail: yongcheng3315@gmail.com
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Notes
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The Mathematical Gazette , Volume 103 , Issue 558 , November 2019 , pp. 521 - 524
Copyright
© Mathematical Association 2019 

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References

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