Frustum Nostalgia

Nostalgia for the Frustum is a collection of mathematical poetry. Hong Kong poet Ji Jihe attempts to incorporate his extensive mathematical knowledge into the form of modern poetry. Visual artist Kori Song's illustrations create an intriguing dialogue with the poetry.

Poet Wen Yutian even commented in his preface: "The entire collection of poems is like a precisely designed mechanical device, each part is closely connected with the others, together constructing a space where rationality and poetry coexist."

Ji Geometry

Math teacher, truncated head. Using different entities, they wander between letters and notes. Subtract two and there's still nine.

The poetry collection directory structure is sorted according to the Fibonacci sequence:

Volume 1: Low-End Math Tangram, Chicken and Rabbit in the Same Cage, Weights and Measures, Tower of Hanoi, Nine-Factor Song
Flextangle
Mathematical Olympiad problems, second hand, Hua Luogeng Cup Mathematics Competition, tangram, word problems, unit twist counter, abstract elementary school math problems

Section 1: Arithmetic and Ethics: Double negative to equal positive; Recurring decimals, rounding, carrying, simplifying remainders; Subtraction, multiplication and division before addition and subtraction; Rationalization, common denominator, dividing by zero, prime factorization, zero power, rounding, zero multiplier, single number + odd number = even number, answer to two decimal places, converting recurring decimals to fractions, addends, multipliers, and powers, greatest common factor and least common multiple; Division of fractions

2. Plane Geometry (How to Scrape in the Two-Dimensional World)
Geometric point, golden ratio, acute and obtuse angles, square, parabola, circular curve, 3.14 compasses, inscribed circle, concentric circles, lines, ellipse, parallel and perpendicular lines, four lines, four centers of a triangle, intersection of points and lines, rotational symmetry, straight line
Tangent to the diagonal circle (of a quadrilateral)

Part 3: Solid Geometry (On Space and His Religious Views)
Scutellum Projected Frustum Spherical Frustum

Volume 5: Logic, Critean Paradox, Proof by Contradiction, Contradiction of Contradiction
Trivial

Numbers, All Too Numbers
Irrational numbers with decimal points
12
Counting hexadecimal prime numbers from one
7
Denominator arithmetic progression triangular number half one prime number and composite number trillion zero binary √-1
Irrational Quantification of the Seventh Pascal Triangle

Part 13 Statistics (A Kind of Espionage)
Discrete and continuous sample space standard deviation mode random Monte Carlo bar chart scatter plot (correlation coefficient = 0)
Dry leaf graph, pictogram, pie chart, box chart, random numbers

Algebra (The Art of Taking the Blame)