IFS(IFoS) Maths Optional Syllabus
IFS(IFoS) Maths/Mathematics Optional Mains Syllabus 2025-2026
Paper-1
Section-A
Linear Algebra: Vector, space, linear dependence and independence, subspaces, bases, dimensions. Finite dimensional vector spaces. Matrices, Cayley-Hamilton theorem, Eigen values and Eigenvectors, matrix of linear transformation, row and column reduction, Echelon form, equivalence, congruence and similarity, reduction to canonical form, rank, orthogonal, symmetrical, skew symmetrical, unitary, Hermitian, skew-Hermitian forms their Eigen values. Orthogonal and unitary reduction of quadratic and Hermitian forms, positive definite quadratic forms.
Calculus: Real numbers, limits, continuity, differentiability, mean-value theorems, Taylor's theorem with remainders, indeterminate forms, maxima and minima, asymptotes. Functions of several variables: continuity, differentiability, partial derivatives, maxima and minima, Lagrange's method of multipliers, Jacobian. Riemann's definition of definite integrals, indefinite integrals, infinite and improper integrals, beta and gamma functions. Double and triple integrals (evaluation techniques only). Areas, surface and volumes, centre of gravity.
Analytic Geometry: Cartesian and polar coordinates in two and three dimensions, second degree equations in two and three dimensions, reduction to canonical forms, straight lines, shortest distance between two skew lines, plane, sphere, cone, cylinder, paraboloid, ellipsoid, hyperboloid of one and two sheets and their properties.
Section-B
Ordinary Differential Equations: Formulation of differential equations, order and degree, equations of first order and first degree, integrating factor, equations of first order but not of first degree, Clairaut’s equation, singular solution. Higher order linear equations, with constant coefficients, complementary function and particular integral, general solution, Euler-Cauchy equation. Second order linear equations with variable coefficients, determination of complete solution when one solution is known, method of variation of parameters.
Dynamics, Statics and Hydrostatics:
(i) Dynamics: Degree of freedom and constraints, rectilinear motion, simple harmonic motion, motion in a plane, projectiles, constrained motion, work and energy, conservation of energy, motion under impulsive forces, Kepler's laws, orbits under central forces, motion of varying mass, motion under resistance.
(ii) Statics: Equilibrium of a system of particles, work and potential energy, friction, common catenary, principle of virtual work, stability of equilibrium, equilibrium of forces in three dimensions.
(iii) Hydro Statics: Pressure of heavy fluids, equilibrium of fluids under given system of forces Bernoulli's equation, centre of pressure, thrust on curved surfaces, equilibrium of floating bodies, stability of equilibrium, metacentre, pressure of gases.
Vector Analysis: Scalar and vector fields, triple, products, differentiation of vector function of a scalar variable, gradient, divergence and curl in Cartesian, cylindrical and spherical coordinates and their physical interpretations. Higher order derivatives, vector identities and vector equations. Application to Geometry: Curves in space, curvature and torsion. Serret-Frenet's formulae, Gauss and Stokes' theorems, Green's identities.
IFS(IFoS) Maths/Mathematics Optional Mains Syllabus 2025-2026
Paper-II
Section-A
Algebra: Groups, subgroups, normal subgroups, homomorphism of groups quotient groups basic isomorphism theorems, Sylow's group, permutation groups, Cayley theorem. Rings and ideals, principal ideal domains, unique factorization domains and Euclidean domains. Field extensions, finite fields.
Real Analysis: Real number system, ordered sets, bounds, ordered field, real number system as an ordered field with least upper bound property, Cauchy sequence, completeness, Continuity and uniform continuity of functions, properties of continuous functions on compact sets. Riemann integral, improper integrals, absolute and conditional convergence of series of real and complex terms, rearrangement of series. Uniform convergence, continuity, differentiability and integrability for sequences and series of functions. Differentiation of functions of several variables, change in the order of partial derivatives, implicit function theorem, maxima and minima. Multiple integrals.
Complex Analysis: Analytic function, Cauchy-Riemann equations, Cauchy's theorem, Cauchy's integral formula, power series, Taylor's series, Laurent's Series, Singularities, Cauchy's residue theorem, contour integration. Conformal mapping, bilinear transformations.
Linear Programming: Linear programming problems, basic solution, basic feasible solution and optimal solution, graphical method and Simplex method of solutions. Duality. Transportation and assignment problems. Travelling salesman problems.
Section-B
Partial differential equations: Curves and surfaces in three dimensions, formulation of partial differential equations, solutions of equations of type dx/p=dy/q=dz/r; orthogonal trajectories, Pfaffian differential equations; partial differential equations of the first order, solution by Cauchy's method of characteristics; Charpit's method of solutions, linear partial differential equations of the second order with constant coefficients, equations of vibrating string, heat equation, Laplace equation.
Numerical Analysis and Computer programming:
Numerical methods: Solution of algebraic and transcendental equations of one variable by bisection, Regula-Falsi and Newton-Raphson methods, solution of system of linear equations by Gaussian elimination and Gauss-Jordan (direct) methods, Gauss-Seidel(iterative) method. Newton's (Forward and backward) and Lagrange's method of interpolation.
Numerical integration: Simpson's one-third rule, trapezoidal rule, Gaussian quadrature formula.
Numerical solution of ordinary differential equations: Euler and Runge Kutta-methods.
Computer Programming: Storage of numbers in Computers, bits, bytes and words, binary system. arithmetic and logical operations on numbers. Bitwise operations. AND, OR, XOR, NOT, and shift/rotate operators. Octal and Hexadecimal Systems. Conversion to and from decimal Systems. Representation of unsigned integers, signed integers and reals, double precision reals and long integers. Algorithms and flow charts for solving numerical analysis problems. Developing simple programs in Basic for problems involving techniques covered in the numerical analysis.
Mechanics and Fluid Dynamics:
(i) Mechanics: Generalized coordinates, constraints, holonomic and non-holonomic, systems. D’Alembert’s principle and Lagrange' equations, Hamilton equations, moment of inertia, motion of rigid bodies in two dimensions.
(ii) Fluid Dynamics: Equation of continuity, Euler's equation of motion for in viscid flow, stream-lines, path of a particle, potential flow, two-dimensional and axisymmetric motion, sources and sinks, vortex motion, flow past a cylinder and a sphere, method of images. Navier-Stokes equation for a viscous fluid.
About IFoS (IFS) Maths/Mathematics Optional Syllabus 2025-2026:
IFS(IFoS) Mathematics Mains Optional Syllabus is same as UPSC/IAS/Civil Services Mains Maths Optional Syllabus with slight difference in IFS(IFoS) Maths Syllabus Paper 1 Section A and B and IFS(IFoS) Maths Syllabus Paper 2 Section A and B.
Linear Algebra: They have added Orthogonal and unitary reduction of quadratic and Hermitian forms, positive definite quadratic forms.
Calculus: They have added Centre of gravity.
Ordinary Differential Equations: They have removed Laplace transformations and related concepts.
Dynamics & Statics: They have added complete Chapter Module Hydro Statics.
Modern Algebra: They have added Sylow's group, Field extensions, Finite fields.
Complex Analysis: They have added Conformal mapping, bilinear transformations.
Linear Programming: They have added Travelling salesman problems.
Partial differential equations: They have added Pfaffian differential equations; Charpit's Method of solutions
Numerical Analysis & Computer Programming: They have added Developing simple programs in Basic for problems involving techniques covered in the numerical analysis.
Rest of the Modules or Chapters are more or less same.
There will be at least 2 months gap will be for IAS/UPSC/Civil Services Mains and IFoS(IFS) Mains. So, you can study these extra Concepts/Chapters/Modules within 10days only. there fore nothing to worry for extra part in the IFoS(IFS) Mains Maths Optional Syllabus.
About IFoS/IFS Mathematics Optional Syllabus
Getting a good idea of the About IFoS/IFS Mathematics optional syllabus is vital for preparing for the IFoS/IFS Mains examination. Usually, two exams are separated by 2 months: the IFoS/IFS Mains exam and the Civil Services Mains exam. During the second exam, candidates can study the additional concepts for the remaining 2 months. The IFoS/IFS examination is not difficult as you think, so it is essential to prepare properly.
Interestingly, the IFoS/IFS mathematics syllabus is almost the same as the UPSC/IAS/Civil Services Mains Maths Optional Syllabus. The only difference is the paper 1 & paper 2 are already mentioned above. If you're unsure about the exact IFoS/IFS syllabus, you can find it here.
The IFoS/IFS Mathematics Optionally Syllabus is similar to the UPSC/IAS/Civil Services Mains syllabus. However, there are slight differences between the two. While paper 1 has an identical syllabus, paper 2 is slightly different. To avoid confusion, it is good to study the two sets of papers before applying. So, you can focus on which part you want to concentrate on.
IFoS/IFS Mathematics Optionally Syllabus: The IFS/IFS Maths Optional Syllabus is the same as the UPSC IAS/Civil Services mains syllabus. There are some differences in the paper 1 section, but the overall syllabus is similar to the IAS/Civil Services mains exams. Read this article if you are looking for a detailed overview of the IFoS/IFS Maths Optional Syllabi.
You'll need to take the optional subjects seriously. You'll need to know the important topics of the syllabus to be successful. For example, Ramanasri Sir, the IFoS Mathematics Optional Syllabus will cover the IFoS/IFS test questions. It will also include the IFoS/IFS subject and the Mains test series pattern. Aside from this, you'll need to be able to answer many essay-related questions.
The syllabus for the optional subjects is similar to that of the civil services. However, there are fewer vacancies in civil services. The eligibility criteria for both the civil services and IFoS are the same. You'll need a bachelor's degree in a maths-related field to qualify for the exam. If you've got a diploma or honors degree B.Sc., in a maths-related field, it's best.
The IFoS/IFS Mathematics Optionally-Syllabus should include all topics. Therefore, you should be familiar with these subjects. In addition, it would help to familiarize yourself with modern algebra or abstract algebra concepts of these maths optional subjects.