## THERMAL SCIENCE

International Scientific Journal

### Thermal Science - Online First

online first only
### Motion equations and non-Noether symmetries of Lagrangian systems with conformable fractional derivative

**ABSTRACT**

In this paper, we present the fractional motion equations and fractional non-Noether symmetries of Lagrangian systems with the conformable fractional derivatives. The exchanging relationship between isochronous variation and fractional derivative, and the fractional Hamilton's principle of the holonomic conservative and non-conservative systems under the conformable fractional derivative are proposed. Then the fractional motion equations of these systems based on the Hamilton's principle are established. The fractional Euler operator, the definition of fractional non-Noether symmetries, non-Noether theorem and Hojman's conserved quantities for the Lagrangian systems are obtained with conformable fractional derivative. An example is given to illustrate the results.

**KEYWORDS**

PAPER SUBMITTED: 2020-05-20

PAPER REVISED: 2020-06-20

PAPER ACCEPTED: 2020-06-20

PUBLISHED ONLINE: 2021-01-31

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