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1 Logic

• Reveries
• 8liam.7z
• 78875x
• Ma.7z
• Breast

2 Proofs

• 1. Direct Proofs
• 2. Divisibility
• 3. Existence proofs
• 4. Induction
• 5. Uniqueness Arguments
• 6. Indirect Proof

3 Number Theory

• 1. Congruence
• 2. $\Z_n$
• 3. The Euclidean Algorithm
• 4. $\U_n$
• 5. The Fundamental Theorem of Arithmetic
• 6. The GCD and the LCM
• 7. The Chinese Remainder Theorem
• 8. The Euler Phi Function
• 9. The Phi Function—Continued
• 10. Wilson's Theorem and Euler's Theorem
• 11. Public Key Cryptography
• 12. Quadratic Reciprocity

4 Functions

• 1. Definition and Examples
• 2. Induced Set Functions
• 3. Injections and Surjections
• 4. More Properties of Injections and Surjections
• 5. Pseudo-Inverses
• 6. Bijections and Inverse Functions
• 7. Cardinality and Countability
• 8. Uncountability of the Reals
• 9. The Schröder-Bernstein Theorem
• 10. Cantor's Theorem

5 Relations

• 1. Equivalence Relations
• 2. Factoring Functions
• 3. Ordered Sets
• 4. New Orders from Old
• 5. Partial Orders and Power Sets
• 6. Countable total orders

6 Bibliography

Safety — Pedestrian

: Ramped speed tables that slow drivers down and bring the road up to sidewalk level, making pedestrians more noticeable.

These "pieces" are items individuals can wear or carry to increase their visibility and safety. Pedestrian Safety

: Brands like Illuminite offer reflective apparel that makes you visible to drivers at night without sacrificing style. : Ramped speed tables that slow drivers down

: Shoes designed for high-traffic or industrial environments, like those from Shoes for Crews, help prevent falls on rain-slicked or oily surfaces. Infrastructure Safety Pieces like those from Shoes for Crews

: Raised medians (ideally 6–10 feet wide) in the middle of busy streets that give pedestrians a safe place to wait while crossing multiple lanes.