Please answer the following question: Given the following passage  "Throughout most of his career, Athanasius had many detractors. Classical scholar Timothy Barnes relates contemporary allegations against Athanasius: from defiling an altar, to selling Church grain that had been meant to feed the poor for his own personal gain, and even violence and murder to suppress dissent. Athanasius used "Arian" to describe both followers of Arius, and as a derogatory polemical term for Christians who disagreed with his formulation of the Trinity. Athanasius called many of his opponents "Arian", except for Miletus.",  answer the following question. Note that the answer is present within the text.  Question: What was the disagreement between Athanasius and others in the Christian faith?
Answer:
formulation of the Trinity