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Polish English
Some remarks on definition of the absolute value of the real numberSome remarks on definition of the absolute value of the real number
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About some difficulties in doing proofs encountered by the students from the first year of mathematicsAbout some difficulties in doing proofs encountered by the students from the first year of mathematics
On objective and subjective difficulties in understanding the notions of the least upper bound and the greatest lower boundOn objective and subjective difficulties in understanding the notions of the least upper bound and the greatest lower bound
