Aquino, Arlano Revilla.2026-02-142021-04Aquino, A.R.(2021).Christian ideas manifested in the work of six thinkers instrumental in the development and application of calculus.(Unpbulished master's thesis).University of the Cordilleras, Baguio City.https://dspace.uc-bcf.edu.ph/handle/123456789/518The contribution to science of Christian thinkers is being discovered. A parallel effort in the area of mathematics seems appropriate. Christian contribution to mathematical disciplines, such as Calculus, when unearthed and understood, can lead to greater appreciation of the interrelationship of worldviews, ideas and development. This research sought to identify the Christian concepts held by six mathematicians who contributed to Calculus, three of whom professed traditional Christianity (namely, Copernicus, Kepler, and Euler) and the other three did not (namely, Newton, Levi-Civita, and Einstein). Qualitative research design was used for this study, with emphasis on library research employing a hermeneutical interpretive methodology. The following are the major findings of the study: 1. Three Christian thinkers - Nicholas Copernicus, Johannes Kepler, and Leonhard Euler - affirmed that the Bible is above but not against reason, that God created all things, that the human mind can truly (though not exhaustively) understand the Bible and nature, and that Christian ideas cohere with scientific-mathematical observations. These, too, were affirmed by Isaac Newton. 2. Three non-Christian thinkers - Isaac Newton, Tullio Levi-Civita, and Albert Einstein - believed in the objectivity and rationality of nature. Levi-Civita emphasized internationalism of mathematics. Einstein saw the moral ideals of Judeo-Christianity as proper social goals. 3. The works of the six thinkers intersect at giving a valid mathematical description of nature. They believed that this is possible due to their twin assumptions that nature is real (objectively there) and understandable. In light of the findings of the study, the following are the conclusions: 1. The Christian affirmations of objective reality and rationality of nature are instrumental in building the discipline of Calculus. 2. The cases of Copernicus, Kepler and Euler indicate that Christian ideas are not inimical to academic, scientific and mathematical work. 3. The cases of Newton, Levi-Civita, and Einstein indicate that Christian ideas may be present and appropriated, consciously or unconsciously, in one's professional work. In relation to the findings and conclusions of this research, the following are recommended: 1. The effect(s) of the twin ideas of realism and rationality to Calculus in particular and mathematics in general require further probing. 2. To explore further the possible relationship of Christian and mathematical ideas, the thought of other Christian mathematicians be studied. 3. To discover further Christian influences on mathematical ideas, it may be worthwhile to study the thought and work of other non-Christian mathematicians.en-USThesis